Description:
------------
When the query returns a non UTF-8 character, odbc_fetch_array generates SIGFAULT
If the record contains normal UTF-8 (for example Chinese characters) it works fine. The SQL Server field containing non UTF-8 chars has been defined as NVARCHAR(40)

Test script:
---------------
$dbConn = odbc_connect("Driver={ODBC Driver 11 for SQL Server};Server=myserver.domain.com", 'MyUSER', 'MyPWD');

$query = "SELECT [TXTMD] FROM [/BI0/TMATERIAL] WHERE [LANGU] = 'E' AND [MATERIAL] = 'T_PO1234568'";

$r = odbc_exec($dbConn,$query);
while($record = odbc_fetch_array($r) ) print_r($record);

odbc_close($dbConn);

Expected result:
----------------
If I run it with WHERE [LANGU] = '1' I get UTF-8 chars
Array
(
    [TXTMD] => JLGLQ-0.45-100£¬¹ýÂËÆ÷,ˮϵPES,0.45um,100/°ü
)

with WHERE [LANGU] = 'E' I get segfault. The actual records contains non UTF-8 chars

Actual result:
--------------
edsradmin@SHALSTest:~/apps.cndb/scripts/cndb$ gdb /usr/local/php/7.0.1/bin/php core
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
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Type "show configuration" for configuration details.
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Reading symbols from /usr/local/php/7.0.1/bin/php...done.
[New LWP 16450]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `php -q ./tmp/odbc_sqlsrv.php'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:116
116     ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: No such file or directory.
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
    from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
(gdb) bt
#0  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:116
#1  0x00000000006ecfeb in zend_string_init (str=0x7f6e2ba76080 "", len=18446744073709551612, persistent=0)
    at /home/edsradmin/software/php-7.0.1/Zend/zend_string.h:159
#2  0x00000000006f16ec in php_odbc_fetch_hash (execute_data=0x7f6e2ba14120, return_value=0x7f6e2ba14110, result_type=2)
    at /home/edsradmin/software/php-7.0.1/ext/odbc/php_odbc.c:1812
#3  0x00000000006f18d8 in zif_odbc_fetch_array (execute_data=0x7f6e2ba14120, return_value=0x7f6e2ba14110)
    at /home/edsradmin/software/php-7.0.1/ext/odbc/php_odbc.c:1848
#4  0x0000000000a32ed8 in ZEND_DO_ICALL_SPEC_HANDLER () at /home/edsradmin/software/php-7.0.1/Zend/zend_vm_execute.h:586
#5  0x0000000000a32913 in execute_ex (ex=0x7f6e2ba14030) at /home/edsradmin/software/php-7.0.1/Zend/zend_vm_execute.h:414
#6  0x0000000000a32a25 in zend_execute (op_array=0x7f6e2ba83000, return_value=0x0) at /home/edsradmin/software/php-7.0.1/Zend/zend_vm_execute.h:458
#7  0x00000000009d7c8b in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/edsradmin/software/php-7.0.1/Zend/zend.c:1428
#8  0x00000000009451e8 in php_execute_script (primary_file=0x7ffc7fc3fec0) at /home/edsradmin/software/php-7.0.1/main/main.c:2471
#9  0x0000000000a96c73 in do_cli (argc=3, argv=0x2b821c0) at /home/edsradmin/software/php-7.0.1/sapi/cli/php_cli.c:974
#10 0x0000000000a97e37 in main (argc=3, argv=0x2b821c0) at /home/edsradmin/software/php-7.0.1/sapi/cli/php_cli.c:1345