Adapt assertion as mbfl_strwidth returns a size_t

diff --git a/ext/mbstring/mbstring.c b/ext/mbstring/mbstring.c
index 56731883ba8b4d64c0cc91d1cb6f7a7bf180e0d7..74274f4ae4026e46329e54724bf88751d25fbef6 100644 (file)
--- a/ext/mbstring/mbstring.c
+++ b/ext/mbstring/mbstring.c
@@ -2377,7 +2377,7 @@ PHP_FUNCTION(mb_strwidth)
        }
 
        n = mbfl_strwidth(&string);
-       ZEND_ASSERT(n >= 0);
+       ZEND_ASSERT(n != (size_t) -1);
        RETVAL_LONG(n);
 }
 /* }}} */