ext/intl: Fix return value on failure for resourcebundle count handler

Closes GH-19277

NEWS

@@ -20,6 +20,7 @@ PHP                                                                        NEWS
 - Intl:
   . Fixed GH-19261: msgfmt_parse_message leaks on message creation failure.
     (David Carlier)
+  . Fix return value on failure for resourcebundle count handler. (Girgias)
 
 - LDAP:
   . Fixed bug GH-18529 (additional inheriting of TLS int options).

ext/intl/resourcebundle/resourcebundle_class.c

@@ -257,7 +257,7 @@ static zend_result resourcebundle_array_count(zend_object *object, zend_long *co
 	if (rb->me == NULL) {
 		intl_errors_set(&rb->error, U_ILLEGAL_ARGUMENT_ERROR,
 				"Found unconstructed ResourceBundle", 0);
-		return 0;
+		return FAILURE;
 	}
 
 	*count = ures_getSize( rb->me );