Use dedicated function for type error

Author: Girgias

Zend/zend_execute.c

@@ -2521,7 +2521,7 @@ static zend_never_inline zend_bool ZEND_FASTCALL zend_array_key_exists_fast(Hash
 		str = ZSTR_EMPTY_ALLOC();
 		goto str_key;
 	} else {
-		zend_type_error("Illegal offset type");
+		zend_illegal_offset();
 		return 0;
 	}
 }