pack: gelf: initialize 'val_len' variable
@@ -495,7 +495,7 @@ flb_sds_t flb_msgpack_to_gelf(flb_sds_t *s, msgpack_object *o,
const char *key = NULL;
int key_len;
const char *val = NULL;
- int val_len;
+ int val_len = 0;
int quote = FLB_FALSE;
int custom_key = FLB_FALSE;
