CComponentsItem/Form: add var for real item position

If items are used in forms it can be usefully to have a variable
which contains the real position on screen.
This can happen e.g. if an item contains separate render methods, because within forms
usual x/y values related to form dimensions and be converted.


Origin commit data
------------------
Commit: 62efe2cb59
Author: Thilo Graf <dbt@novatux.de>
Date: 2013-04-10 (Wed, 10 Apr 2013)

src/gui/components/cc_item.cpp

@@ -54,6 +54,7 @@ void CComponentsItem::initVarItem()
 	//CComponents
 	initVarBasic();
 	cc_item_index = CC_NO_INDEX;
+	cc_item_xr = cc_item_yr = -1;
 }
 
 // Paint container background in cc-items with shadow, background and frame.