Fix TrackingChannel dumping

Author: Pasi Miettinen

peregrine/tracking.py

@@ -357,7 +357,6 @@ def run(self, samples):
 
     """
 
-    self.start()
     self.samples = samples
 
     if self.sample_index < samples['sample_index']:
@@ -369,6 +368,8 @@ def run(self, samples):
 
     estimated_blksize = self.coherent_ms * self.sampling_freq / 1e3
 
+    self.track_result.status = 'T'
+
     while self.samples_tracked < self.samples_to_track and \
             (sample_index + 2 * estimated_blksize) < samples_total:
 
@@ -518,12 +519,13 @@ def run(self, samples):
       self.track_result.ms_tracked[self.i] = self.samples_tracked * 1e3 / \
           self.sampling_freq
 
-      self.track_result.status = 'T'
-
       self.i += 1
       if self.i >= self.results_num:
         self.dump()
 
+    if self.i > 0:
+      self.dump()
+
     self.sample_index += samples_processed
 
     return self._get_result()