tidy round1

include/sta/Stats.hh

@@ -40,12 +40,12 @@ public:
   void report(const char *step);
 
 private:
-  double elapsed_begin_;
-  double user_begin_;
-  double system_begin_;
-  size_t memory_begin_;
+  double elapsed_begin_{0.0};
+  double user_begin_{0.0};
+  double system_begin_{0.0};
+  size_t memory_begin_{0};
   Debug *debug_;
   Report *report_;
 };
 
-} // namespace
+} // namespace sta