small improvement

rowers/plannedsessions.py

@@ -825,7 +825,12 @@ def race_can_withdraw(r,race):
     return True
 
 def race_can_register(r,race):
-    records = VirtualRaceResult.objects.filter(
+    if race.sessiontype == 'race':
+        recordobj = VirtualRaceResult
+    else:
+        recordobj = IndoorVirtualRaceResult
+        
+    records = recordobj.objects.filter(
         userid=r.id,
         race=race)