Fix uninitialized tm in data_obs

src/data_obs.cpp

@@ -118,16 +118,19 @@ int data_obs::set_time(int year, int mon, int day, int hour, int min, int sec,
  ********************************************************************************/
 int data_obs::set_time(struct timespec* time) {
 
-	struct tm* tm;
-
-	gmtime_r(&time->tv_sec,tm);
-
-	year = tm->tm_year + 1900;
-	mon = tm->tm_mon + 1;
-	day = tm->tm_mday;
-	hour = tm->tm_hour;
-	min = tm->tm_min;
-	sec = tm->tm_sec;
+	// Initialize tm
+        //TODO Make t a class-variable to avoid repeated allocation
+        struct tm t = {0};
+
+        // Use gmtime_r for thread-safety
+	gmtime_r(&time->tv_sec,&t);
+
+	year = t.tm_year + 1900;
+	mon  = t.tm_mon + 1;
+	day  = t.tm_mday;
+	hour = t.tm_hour;
+	min  = t.tm_min;
+	sec  = t.tm_sec;
 	msec = (int) (time->tv_nsec / 1e6);
 
 	return (0);