fix emailprocessing bug

rowers/views/workoutviews.py

@@ -4697,9 +4697,10 @@ def workout_upload_api(request):
             else:
                 r = None
                 for rwr in Rower.objects.all():
-                    if post_data['useremail'] in rwr.emailalternatives:
-                        r = rwr
-                        break
+                    if rwr.emailalternatives is not None:
+                        if post_data['useremail'] in rwr.emailalternatives:
+                            r = rwr
+                            break
                 if post_data['useremail'] not in r.emailalternatives:
                     message = {'status':'false','message':'could not find user'}
                     return JSONResponse(status=400,data=message)