Small optimization to LLTabContainer update and construction

indra/llui/lltabcontainer.cpp

@@ -928,7 +928,7 @@ void LLTabContainer::addTabPanel(LLPanel* panelp)
 }
 
 // function to update images
-void LLTabContainer::update_images(LLTabTuple* tuple, TabParams params, LLTabContainer::TabPosition pos)
+void LLTabContainer::update_images(LLTabTuple* tuple, const TabParams& params, LLTabContainer::TabPosition pos)
 {
 	if (tuple && tuple->mButton)
 	{

indra/llui/lltabcontainer.h

@@ -261,7 +261,7 @@ class LLTabContainer : public LLPanel
 	void commitHoveredButton(S32 x, S32 y);
 
 	// updates tab button images given the tuple, tab position and the corresponding params
-	void update_images(LLTabTuple* tuple, TabParams params, LLTabContainer::TabPosition pos);
+	void update_images(LLTabTuple* tuple, const TabParams& params, LLTabContainer::TabPosition pos);
 	void reshapeTuple(LLTabTuple* tuple);
 
 	// Variables