Improve report.

rt_analyzer/analyze.py

@@ -42,7 +42,8 @@ for line in lines_list[1:]:
         else:
             delta = timestamp - last_channel0_timestamp
         last_channel0_timestamp = timestamp
-        # but always add delta
+        # but always add delta if not 0
+        if delta > 0:
           timestamp_channel0_delta_list.append(delta)
 
     if channel1 != last_channel1_value:
@@ -53,7 +54,8 @@ for line in lines_list[1:]:
         else:
             delta = timestamp - last_channel1_timestamp
         last_channel1_timestamp = timestamp
-        # but always add delta
+        # but always add delta if not 0
+        if delta > 0:
           timestamp_channel1_delta_list.append(delta)
 
     # update for next cycle