another string_to_number fix
diff --git a/extensions/libip6t_LOG.c b/extensions/libip6t_LOG.c
index ef39c98..aece432 100644
--- a/extensions/libip6t_LOG.c
+++ b/extensions/libip6t_LOG.c
@@ -66,9 +66,9 @@
 static u_int8_t
 parse_level(const char *level)
 {
-	unsigned int lev;
+	unsigned int lev = -1;
 
-	if (string_to_number(level, 0, 7, lev) == -1) {
+	if (string_to_number(level, 0, 7, &lev) == -1) {
 		unsigned int i = 0;
 
 		for (i = 0;