Fix FTBFS caused by incorrect TQColor default value

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

domino/domino.h

@@ -220,7 +220,7 @@ public:
 				const TQPixmap*  /*pixmap*/,
 				const TQString & text,
 				int /*len = -1*/,
-				const TQColor& highlight = 0,
+				const TQColor& highlight = TQColor(0, 0, 0),
 				bool drawLine = true,
 				bool isButton = false) const;