fix for crasher bug #51076. the old category code is not ready for prime time, commenting it out.

mozilla 6.0 doesn't support new categories.  r=mscott

mailnews/news/src/nsNNTPHost.cpp

@@ -2489,7 +2489,6 @@ nsNNTPHost::AddNewNewsgroup(const char *name,
                             PRBool xactiveFlags) {
 
     nsMsgGroupRecord     *groupRecord = nsnull;
-    nsresult rv;
     
 #ifdef DEBUG_NEWS
 	printf("nsNNTPHost::AddNewNewsgroup(%s,...)\n",name);
@@ -2523,10 +2522,15 @@ nsNNTPHost::AddNewNewsgroup(const char *name,
     }
     if (xactiveFlags)
     {
+#ifdef CATEGORIES_SUPPORTED
         SetIsCategoryContainer(name, bIsCategoryContainer, groupRecord);
+#endif /* CATEGORIES_SUPPORTED */
         SetIsVirtualGroup(name, bIsVirtual, groupRecord);
     }
 
+#ifdef CATEGORIES_SUPPORTED
+	nsresult rv;
+
     if (status > 0) {
         // If this really is a new newsgroup, then if it's a category of a
         // subscribed newsgroup, then automatically subscribe to it.
@@ -2550,6 +2554,7 @@ nsNNTPHost::AddNewNewsgroup(const char *name,
             delete [] containerName;
         }
     }
+#endif /* CATEGORIES_SUPPORTED */
 
     if (status <=0) return NS_ERROR_UNEXPECTED;