break the pskreporter loop if there's nothing to upload

owrx/pskreporter.py

@@ -86,6 +86,7 @@ class PskReporter(object):
     def upload(self):
         try:
             with self.spotLock:
+                self.timer = None
                 spots = self.spots
                 self.spots = []
 
@@ -94,9 +95,6 @@ class PskReporter(object):
         except Exception:
             logger.exception("Failed to upload spots")
 
-        self.timer = None
-        self.scheduleNextUpload()
-
     def cancelTimer(self):
         if self.timer:
             self.timer.cancel()