fix warnings

stuff/profiler.hh

@@ -128,8 +128,8 @@ public:
 
 protected:
   MapVector m_timings;
-  int m_cur_run_num;
-  int m_total_runs;
+  unsigned int m_cur_run_num;
+  unsigned int m_total_runs;
   // debug counter, only outputted in debug mode
   std::map<int, int> m_count;
   clock_t init_time_;