fix missing includes

core/include/queue.h

@@ -26,5 +26,8 @@ void queue_priority_add(queue_node_t *root, queue_node_t *new_obj);
 void queue_priority_add_generic(queue_node_t *root, queue_node_t *new_obj, int(*cmp)(queue_node_t *, queue_node_t *)) ;
 void queue_remove(queue_node_t *root, queue_node_t *node);
 
+void queue_print(queue_node_t *node);
+void queue_print_node(queue_node_t *node);
+
 /** @} */
 #endif // __QUEUE_H

sys/include/vtimer.h

@@ -99,11 +99,11 @@ void vtimer_print(vtimer_t *t);
 /**
  * @brief Prints the vtimer shortterm queue (use for debug purposes)
  */
-void vtimer_print_short_queue();
+void vtimer_print_short_queue(void);
 
 /**
  * @brief Prints the vtimer longterm queue (use for debug purposes)
  */
-void vtimer_print_long_queue();
+void vtimer_print_long_queue(void);
 
 #endif /* __VTIMER_H */

sys/vtimer/vtimer.c

@@ -9,6 +9,7 @@
 #include <hwtimer.h>
 #include <msg.h>
 #include <thread.h>
+#include <queue.h>
 
 #include <vtimer.h>
 
@@ -296,7 +297,7 @@ void vtimer_print_long_queue(){
     queue_print(&longterm_queue_root);
 }
 
-static void vtimer_print(vtimer_t *t)
+void vtimer_print(vtimer_t *t)
 {
     printf("Seconds: %"PRIu32" - Microseconds: %"PRIu32"\n \
             action: %p\n \