Description:
------------
the glob() function crashes when you pass GLOB_ALTDIRFUNC (512) as a a flag, in short glob should only accept the flags it really supports . 

Reproduce code:
---------------
./php5/sapi/cli/php -r 'var_dump(glob("*",512));'

Expected result:
----------------
only the supported options whitelisted and/or at least GLOB_ALTDIRFUNC and GLOB_APPEND blacklisted.

Actual result:
--------------
gdb --args ./php5/sapi/cli/php -r 'var_dump(glob("*",512));'
GNU gdb 6.5
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This GDB was configured as "x86_64-suse-linux"...Using host libthread_db library "/lib64/libthread_db.so.1".

(gdb) run
Starting program: /home/cristian/php5/sapi/cli/php -r var_dump\(glob\(\"\*\",512\)\)\;

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt full
#0  0x0000000000000000 in ?? ()
No symbol table info available.
#1  0x00002b8a1b81ad62 in glob_in_dir () from /lib64/libc.so.6
No symbol table info available.
#2  0x00002b8a1b81b9bd in glob64 () from /lib64/libc.so.6
No symbol table info available.
#3  0x000000000060fff1 in zif_glob (ht=2, return_value=0xc968d8, return_value_ptr=0x0, this_ptr=0x0, return_value_used=1) at /home/cristian/php5/ext/standard/dir.c:417
        cwd_skip = 0
        pattern = 0xc96880 "*"
        pattern_len = 1
        flags = 512
        globbuf = {gl_pathc = 0, gl_pathv = 0x0, gl_offs = 0, gl_flags = 0, gl_closedir = 0, gl_readdir = 0, gl_opendir = 0, gl_lstat = 0, gl_stat = 0}
        n = 0
        ret = -1877809728
#4  0x00000000007319d6 in zend_do_fcall_common_helper_SPEC (execute_data=0x7fff9012e640) at /home/cristian/php5/Zend/zend_vm_execute.h:200
        return_reference = 0 '\0'
        opline = (zend_op *) 0xc965d0
        original_return_value = (zval **) 0xb208d0
        current_scope = (zend_class_entry *) 0x0
        current_this = (zval *) 0x0
        return_value_used = 1
        should_change_scope = 0 '\0'
        ctor_opline = (zend_op *) 0x50072fb1b
#5  0x0000000000738190 in ZEND_DO_FCALL_SPEC_CONST_HANDLER (execute_data=0x7fff9012e640) at /home/cristian/php5/Zend/zend_vm_execute.h:1681
        opline = (zend_op *) 0xc965d0
        fname = (zval *) 0xc96600
#6  0x000000000073141e in execute (op_array=0xc96288) at /home/cristian/php5/Zend/zend_vm_execute.h:92
        execute_data = {opline = 0xc965d0, function_state = {function_symbol_table = 0x0, function = 0xb208f0, reserved = {0x7fff9012e690, 0x0, 0x0, 0x0}}, fbc = 0x0,
---Type <return> to continue, or q <return> to quit---
  op_array = 0xc96288, object = 0x0, Ts = 0x7fff9012e5c0, CVs = 0x7fff9012e5b0, original_in_execution = 0 '\0', symbol_table = 0xadc528, prev_execute_data = 0x0,
  old_error_reporting = 0x0}
#7  0x00000000006f87dd in zend_eval_string (str=0x7fff90130f4b "var_dump(glob(\"*\",512));", retval_ptr=0x0, string_name=0x84052c "Command line code")
    at /home/cristian/php5/Zend/zend_execute_API.c:1171
        local_retval_ptr = (zval *) 0x0
        original_return_value_ptr_ptr = (zval **) 0x0
        original_opline_ptr = (zend_op **) 0x0
        pv = {value = {lval = 13194888, dval = 6.5191408615229139e-317, str = {val = 0xc95688 "var_dump(glob(\"*\",512));", len = 24}, ht = 0xc95688, obj = {handle = 13194888,
      handlers = 0x18}}, refcount = 13384816, type = 6 '\006', is_ref = 0 '\0'}
        new_op_array = (zend_op_array *) 0xc96288
        original_active_op_array = (zend_op_array *) 0x0
        original_function_state_ptr = (zend_function_state *) 0x0
        original_handle_op_arrays = 1 '\001'
        retval = 0
#8  0x00000000006f8981 in zend_eval_string_ex (str=0x7fff90130f4b "var_dump(glob(\"*\",512));", retval_ptr=0x0, string_name=0x84052c "Command line code", handle_exceptions=1)
    at /home/cristian/php5/Zend/zend_execute_API.c:1205
        result = 0
#9  0x000000000078e8dd in main (argc=3, argv=0x7fff9012ec18) at /home/cristian/php5/sapi/cli/php_cli.c:1179
        __orig_bailout = (jmp_buf *) 0x0
        __bailout = {{__jmpbuf = {47872153828320, -69669401190941675, 0, 140735610547216, 0, 0, -69669401190944539, -69801448083912037}, __mask_was_saved = 0, __saved_mask = {
      __val = {0, 0, 140735610546528, 0, 0, 0, 0, 0, 47872151728128, 47872171956992, 47872153830976, 47872153832832, 281474976710656, 0, 0, 0}}}}
        exit_status = 0
        c = -1
        file_handle = {type = 2 '\002', filename = 0x8404d5 "-", opened_path = 0x0, handle = {fd = 464262784, fp = 0x2b8a1bac1680, stream = {handle = 0x2b8a1bac1680,
      reader = 0x2b8a1b794d80 <data.7078+64800>, closer = 0x40e9e0, fteller = 0x100000000, interactive = 1955}}, free_filename = 0 '\0'}
        behavior = 6
        reflection_what = 0x0
        orig_optind = 1
---Type <return> to continue, or q <return> to quit---
        orig_optarg = 0x0
        arg_free = 0x7fff90130f4b "var_dump(glob(\"*\",512));"
        arg_excp = (char **) 0x7fff9012ec28
        script_file = 0x0
        interactive = 0
        module_started = 1
        request_started = 1
        lineno = 0
        exec_direct = 0x7fff90130f4b "var_dump(glob(\"*\",512));"
        exec_run = 0x0
        exec_begin = 0x0
        exec_end = 0x0
        param_error = 0x0
        hide_argv = 0
        ini_entries_len = 110