Don't plot datapoints with 0 time

AccelVisualizer/Chart.xaml.cs

@@ -136,6 +136,12 @@ namespace AccelVisualizer
 
         private void PlotSensorData(StampedSensorData data)
         {
+            //If time is 0, don't plot
+            if(data.GetSeconds() == 0)
+            {
+                return;
+            }
+
             //Convert to Measurement data types
             Measurement X, Y, Z;
             double now = data.GetSeconds() - startTime;