Fix compiler warning in zend_test

Closes GH-16650

Author: arnaud-lb

ext/zend_test/observer.c

@@ -315,7 +315,7 @@ static ZEND_INI_MH(zend_test_observer_OnUpdateCommaList)
 	}
 	if (stage != PHP_INI_STAGE_STARTUP && stage != PHP_INI_STAGE_ACTIVATE && stage != PHP_INI_STAGE_DEACTIVATE && stage != PHP_INI_STAGE_SHUTDOWN) {
 		ZEND_HASH_FOREACH_STR_KEY(*p, funcname) {
-			if ((func = zend_hash_find_ptr(EG(function_table), funcname)) && ZEND_OBSERVER_DATA(func) != NULL) {
+			if ((func = zend_hash_find_ptr(EG(function_table), funcname))) {
 				void *old_handler;
 				zend_observer_remove_begin_handler(func, observer_begin, (zend_observer_fcall_begin_handler *)&old_handler);
 				zend_observer_remove_end_handler(func, observer_end, (zend_observer_fcall_end_handler *)&old_handler);
@@ -338,7 +338,7 @@ static ZEND_INI_MH(zend_test_observer_OnUpdateCommaList)
 		zend_string_release(str);
 		if (stage != PHP_INI_STAGE_STARTUP && stage != PHP_INI_STAGE_ACTIVATE && stage != PHP_INI_STAGE_DEACTIVATE && stage != PHP_INI_STAGE_SHUTDOWN) {
 			ZEND_HASH_FOREACH_STR_KEY(*p, funcname) {
-				if ((func = zend_hash_find_ptr(EG(function_table), funcname)) && ZEND_OBSERVER_DATA(func) != NULL) {
+				if ((func = zend_hash_find_ptr(EG(function_table), funcname))) {
 					zend_observer_add_begin_handler(func, observer_begin);
 					zend_observer_add_end_handler(func, observer_end);
 				}