EXT-2203 : Wear btn doesn't disable after last Outfit deleted

Simple one-line fix, but fixes a core issue where if the last item in a panel is deleted, no notification is triggered.

indra/newview/llfolderview.cpp

@@ -569,6 +569,8 @@ LLFolderViewItem* LLFolderView::getCurSelectedItem( void )
 BOOL LLFolderView::setSelection(LLFolderViewItem* selection, BOOL openitem,
 								BOOL take_keyboard_focus)
 {
+	mSignalSelectCallback = take_keyboard_focus ? SIGNAL_KEYBOARD_FOCUS : SIGNAL_NO_KEYBOARD_FOCUS;
+
 	if( selection == this )
 	{
 		return FALSE;
@@ -596,8 +598,6 @@ BOOL LLFolderView::setSelection(LLFolderViewItem* selection, BOOL openitem,
 
 	llassert(mSelectedItems.size() <= 1);
 
-	mSignalSelectCallback = take_keyboard_focus ? SIGNAL_KEYBOARD_FOCUS : SIGNAL_NO_KEYBOARD_FOCUS;
-
 	return rv;
 }