menue: initialize height variable

Origin commit data
------------------
Commit: 6223f10529
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2018-01-15 (Mon, 15 Jan 2018)

src/gui/widget/menue.cpp

@@ -582,6 +582,7 @@ void CMenuWidget::Init(const std::string &NameString, const std::string &Icon, c
 {
 	//pos
 	x = y		= 0;
+	height		= 0;
 
 	//caption and icon
 	nameString 	= NameString;