added tcx file export error check

rowers/views.py

@@ -685,12 +685,20 @@ def workout_tcxemail_view(request,id=0):
     if (checkworkoutuser(request.user,w)):
         try:
 	    tcxfile = stravastuff.createstravaworkoutdata(w)
-	    if settings.DEBUG:	    
+            if tcxfile == 0:
+                message = "Something went wrong (TCX export)"
+                url = reverse(workout_export_view,
+                              kwargs = {
+                                  'id':str(w.id),
+                                  'message':message,
+                                  })
+                return HttpResponseRedirect(url)
+	    if settings.DEBUG and tcxfile:	    
 	        res = handle_sendemailtcx.delay(r.user.first_name,
 					        r.user.last_name,
 					        r.user.email,tcxfile)
 
-	    else:
+	    elif tcxfile:
 	        res = queuehigh.enqueue(handle_sendemailtcx,r.user.first_name,
 				        r.user.last_name,
 				        r.user.email,tcxfile)