fix compilation for glib >= 2.60

closes #760

Change-Id: I7fa9ee50663cdb91fe09147507734fbd88afce8c

include/aux.h

@@ -95,11 +95,13 @@ INLINE void g_queue_truncate(GQueue *q, unsigned int len) {
 	while (q->length > len)
 		g_queue_pop_tail(q);
 }
+#if !(GLIB_CHECK_VERSION(2,60,0))
 INLINE void g_queue_clear_full(GQueue *q, GDestroyNotify free_func) {
 	void *p;
 	while ((p = g_queue_pop_head(q)))
 		free_func(p);
 }
+#endif
 INLINE void g_queue_append(GQueue *dst, const GQueue *src) {
 	GList *l;
 	if (!src || !dst)