Merge pull request #208 from zentyal/jgarcia/wocontext-fun

User context activation when cached

OpenChange/MAPIStoreUserContext.m

@@ -73,6 +73,8 @@ static NSMapTable *contextsTable = nil;
       [userContext autorelease];
       [contextsTable setObject: userContext forKey: username];
     }
+  else
+    [userContext activate];
 
   return userContext;
 }

SoObjects/SOGo/SOGoObject.m

@@ -180,6 +180,9 @@
         [NSException raise: NSInvalidArgumentException
                      format: @"'_name' must not be an empty string"];
       context = [[WOApplication application] context];
+      if (!context)
+        [self errorWithFormat: @"Error: initializing a SOGoObject (named %@) "
+                               @"without wocontext", _name];
       nameInContainer = [_name copy];
       container = _container;
       if ([self doesRetainContainer])