Add the DominoStyleConfig class as a friend to DominoStyle.

This resolves FTBFS due to access to protected enums.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 2e7fe96258)

domino/domino.h

@@ -96,6 +96,8 @@ class DominoStyle : public TDEStyle
 {
 	Q_OBJECT
 
+	friend class DominoStyleConfig;
+
 public:
 	
 	DominoStyle();