bug fix recalc stats for nonexisting row

rowers/views.py

@@ -2204,15 +2204,23 @@ def workout_recalcsummary_view(request,id=0):
 
     filename = row.csvfilename
     rowdata = rdata(filename)
-    row.summary = rowdata.allstats()
-    row.save()
-    successmessage = "Summary Updated"
-    url = reverse(workout_edit_view,
+    if row:
+        row.summary = rowdata.allstats()
+        row.save()
+        successmessage = "Summary Updated"
+        url = reverse(workout_edit_view,
 		  kwargs = {
 		      'id':str(id),
 		      'successmessage':str(successmessage),
 		  })
-    
+    else:
+        message = "Something went wrong. Could not update summary"
+        url = reverse(workout_edit_view,
+                      kwargs = {
+                          'id':str(id),
+                          'message':str(message),
+                          })
+        
     return HttpResponseRedirect(url)
 
 @login_required()