Fixed heap overflow

main/streams/filter.c

@@ -265,7 +265,8 @@ PHPAPI php_stream_filter *php_stream_filter_create(const char *filtername, zval
 		/* try a wildcard */
 		char *wildname;
 
-		wildname = estrdup(filtername);
+		wildname = emalloc(n+3);
+		memcpy(wildname, filtername, n+1);
 		period = wildname + (period - filtername);
 		while (period && !filter) {
 			*period = '\0';