Fix leaks

Author: Girgias

ext/mbstring/mbstring.c

@@ -1401,6 +1401,7 @@ PHP_FUNCTION(mb_language)
 		zend_string *ini_name = zend_string_init("mbstring.language", sizeof("mbstring.language") - 1, 0);
 		if (FAILURE == zend_alter_ini_entry(ini_name, name, PHP_INI_USER, PHP_INI_STAGE_RUNTIME)) {
 			zend_value_error("Unknown language \"%s\"", ZSTR_VAL(name));
+			zend_string_release_ex(ini_name, 0);
 			return;
 		} else {
 			RETVAL_TRUE;
@@ -4894,15 +4895,17 @@ MBSTRING_API size_t php_mb_stripos(int mode, const char *old_haystack, size_t ol
 				if ((offset > 0 && (size_t)offset > haystack_char_len) ||
 					(offset < 0 && (size_t)(-offset) > haystack_char_len)) {
  					zend_value_error("Offset is greater than the length of haystack string");
- 					return -1;
+ 					n = -1;
+ 					break;
  				}
  			} else {
 				if (offset < 0) {
 					offset += (zend_long)haystack_char_len;
 				}
 				if (offset < 0 || (size_t)offset > haystack_char_len) {
  					zend_value_error("Offset not contained in string");
- 					return -1;
+ 					n = -1;
+ 					break;
  				}
  			}
 		}