fix possible segfault in php_smb_ops_close when called after php_smb_…

[remicollet]

…pool_cleanup (unclosed stream)

[remicollet]

For memory (discovered during test for #81)

#0  0x00007ffff7294010 in ?? ()
#1  0x00007ffff7fa2371 in php_smb_ops_close (stream=0x7ffff728a380, close_handle=<optimized out>) at /work/GIT/pecl-and-ext/smbclient/smb_streams.c:176
#2  0x0000555555791784 in _php_stream_free (stream=<optimized out>, close_options=11) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/main/streams/streams.c:475
#3  0x0000555555791a46 in stream_resource_regular_dtor (rsrc=<optimized out>) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/main/streams/streams.c:1681
#4  0x00005555557f5585 in zend_resource_dtor (res=<optimized out>) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/Zend/zend_list.c:72
#5  0x00005555557f5b39 in zend_close_rsrc_list (ht=<optimized out>) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/Zend/zend_list.c:220
#6  0x00005555557d25e2 in shutdown_executor () at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/Zend/zend_execute_API.c:272
#7  0x00005555557e1a98 in zend_deactivate () at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/Zend/zend.c:1225
#8  0x000055555577b461 in php_request_shutdown (dummy=<optimized out>) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/main/main.c:1805
#9  0x0000555555871e9c in do_cli (argc=5, argv=0x555555e22600) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/sapi/cli/php_cli.c:1109
#10 0x000055555563a60e in main (argc=5, argv=0x555555e22600) at /usr/src/debug/php80-php-8.0.2-1.fc33.remi.x86_64/sapi/cli/php_cli.c:1335

[eduardok]

@remicollet I will release 1.0.5 tonight when I'm home, had to come to the office today, thanks :)