Added gpsd_report check

gps_tool/gps_tool.py

@@ -125,7 +125,14 @@ class QtGPSWindow(MainWindow):
     global gpsd_report
     report = gpsd_report
 
+    # make sure is good report
     try:
+      if not 'class' in report:
+        return
+    except:
+      return
+    
+    # GPS messages
     if report['class'] == 'TPV': 
       status = getattr(report, 'status', 0)
       mode = getattr(report, 'mode', 0)
@@ -241,8 +248,6 @@ class QtGPSWindow(MainWindow):
       self.viewSatellites.show()
       
     self.show()
-    except:
-      pass
   
   def toggle_logging(self):
     if self.log_enabled: