Make sure that the source implements groups support prior than querying it for groups.

Monotone-Parent: e1d0bc18ecaf333b66126f3d3f7d8dfdb0580d70
Monotone-Revision: 8e6238fb5afca88582d8e5b9645e8f690b18ddd8

Monotone-Author: ludovic@Sophos.ca
Monotone-Date: 2009-10-07T20:46:16
Monotone-Branch: ca.inverse.sogo

SoObjects/SOGo/SOGoGroup.m

@@ -128,9 +128,12 @@
   for (i = 0; i < [allSources count]; i++)
     {
       source = [[SOGoUserManager sharedUserManager] sourceWithID: [allSources objectAtIndex: i]];
-      entry = [source performSelector: theSelector
-		      withObject: theValue];
 
+      // Our different sources might not all implements groups support
+      if ([source respondsToSelector: theSelector])
+	entry = [source performSelector: theSelector
+			withObject: theValue];
+      
       if (entry)
 	break;