Description:
------------
Segmentation fault when used with some arguments.

Test script:
---------------
$ php-fpm -h
$ php-fpm --help
$ php-fpm -v

And maybe some others.

Expected result:
----------------
Console output.

Actual result:
--------------
Core was generated by `php-fpm -h'.
Program terminated with signal 11, Segmentation fault.
#0  0x086aa5f4 in fcgi_write (req=0x0, type=FCGI_STDOUT, 
    str=0xb68ba064 "Usage: php [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini f"..., len=839) at /storage/builds/php/php5.4-201108010030/sapi/fpm/fpm/fastcgi.c:957
957		if (req->out_hdr && req->out_hdr->type != type) {
(gdb) bt
#0  0x086aa5f4 in fcgi_write (req=0x0, type=FCGI_STDOUT, 
    str=0xb68ba064 "Usage: php [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini f"..., len=839) at /storage/builds/php/php5.4-201108010030/sapi/fpm/fpm/fastcgi.c:957
#1  0x086b2689 in sapi_cgibin_single_write (
    str=0xb68ba064 "Usage: php [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini f"..., str_length=839)
    at /storage/builds/php/php5.4-201108010030/sapi/fpm/fpm/fpm_main.c:269
#2  0x086b26c4 in sapi_cgibin_ub_write (
    str=0xb68ba064 "Usage: php [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini f"..., str_length=839)
    at /storage/builds/php/php5.4-201108010030/sapi/fpm/fpm/fpm_main.c:283
#3  0x0853305c in php_output_op (op=0, 
    str=0xb68ba064 "Usage: php [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini f"..., len=839) at /storage/builds/php/php5.4-201108010030/main/output.c:1022
#4  0x08531321 in php_output_write (
    str=0xb68ba064 "Usage: php [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini f"..., len=839) at /storage/builds/php/php5.4-201108010030/main/output.c:201
#5  0x0851b47c in php_printf (
    format=0x8bb54b8 "Usage: %s [-n] [-e] [-h] [-i] [-m] [-v] [-t] [-p <prefix>] [-g <pid>] [-c <file>] [-d foo[=bar]] [-y <file>]\n  -c <path>|<file> Look for php.ini file in this directory\n  -n", ' ' <repeats 15 times>, "No php.ini fi"...) at /storage/builds/php/php5.4-201108010030/main/main.c:607
#6  0x086b38c0 in php_cgi_usage (argv0=0xbf8f1c54 "php-fpm")
    at /storage/builds/php/php5.4-201108010030/sapi/fpm/fpm/fpm_main.c:854
#7  0x086b4ff3 in main (argc=2, argv=0xbf8f0004)
    at /storage/builds/php/php5.4-201108010030/sapi/fpm/fpm/fpm_main.c:1622