Add missing null initialization

diff --git a/ext/mbstring/mbstring.c b/ext/mbstring/mbstring.c
index 501faefe08ec9f0ca6a6b9c7a9f9139a2ba2f090..bcc95eb9ffef4709ed1938f0b8cd7990fc36ad73 100644 (file)
--- a/ext/mbstring/mbstring.c
+++ b/ext/mbstring/mbstring.c
@@ -2732,7 +2732,7 @@ PHP_FUNCTION(mb_substr_count)
 PHP_FUNCTION(mb_substr)
 {
        char *str;
-       zend_string *encoding;
+       zend_string *encoding = NULL;
        zend_long from, len;
        size_t mblen, real_from, real_len;
        size_t str_len;