fix crash in phpdbg shutdown process when opcache is loaded

Author: krakjoe

sapi/phpdbg/phpdbg.c

@@ -228,7 +228,6 @@ static PHP_RSHUTDOWN_FUNCTION(phpdbg) /* {{{ */
 	zend_hash_destroy(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD]);
 	zend_hash_destroy(&PHPDBG_G(bp)[PHPDBG_BREAK_COND]);
 	zend_hash_destroy(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP]);
-	zend_hash_destroy(&PHPDBG_G(file_sources));
 	zend_hash_destroy(&PHPDBG_G(seek));
 	zend_hash_destroy(&PHPDBG_G(registered));
 	zend_hash_destroy(&PHPDBG_G(watchpoints));
@@ -2137,6 +2136,8 @@ int main(int argc, char **argv) /* {{{ */
 			wrapper->wops->stream_opener = PHPDBG_G(orig_url_wrap_php);
 		}
 
+		zend_hash_destroy(&PHPDBG_G(file_sources));
+
 		zend_try {
 			php_module_shutdown();
 		} zend_end_try();