fix leak in history, also somewhat inconsequential leak in preferences

camino/src/history/HistoryDataSource.mm

@@ -569,6 +569,7 @@ public:
       {
         item = [[HistorySiteItem alloc] initWith_nsIHistoryItem:inHistoryItem];
         [mDataSource itemAdded:item];
+        [item release];
       }
     NS_HANDLER
       NSLog(@"Exception caught in ItemLoaded: %@", localException);

camino/src/preferences/MVPreferencesController.mm

@@ -127,6 +127,7 @@ NSString* const MVPreferencesWindowNotification = @"MVPreferencesWindowNotificat
 
 - (void) dealloc
 {
+  [mCurrentPaneIdentifier autorelease];
   [mLoadedPanes autorelease];
   [mPanes autorelease];
   [mPaneInfo autorelease];