protect pskreporter upload loop

owrx/pskreporter.py

@@ -57,12 +57,15 @@ class PskReporter(object):
             self.spots.append(spot)
 
     def upload(self):
+        try:
             with self.spotLock:
                 spots = self.spots
                 self.spots = []
 
             if spots:
                 self.uploader.upload(spots)
+        except Exception:
+            logger.exception("Failed to upload spots")
 
         self.scheduleNextUpload()