Make sure the struct is initialized to 0

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2998 dfc29bdd-3216-0410-991c-e03cc46cb475

include/SExposedVideoData.h

@@ -24,6 +24,9 @@ you are using the software or the null device.
 */
 struct SExposedVideoData
 {
+	SExposedVideoData() {OpenGLWin32.HDc=0; OpenGLWin32.HRc=0; OpenGLWin32.HWnd=0;}
+	explicit SExposedVideoData(void* Window) {OpenGLWin32.HDc=0; OpenGLWin32.HRc=0; OpenGLWin32.HWnd=Window;}
+
 	union
 	{
 		struct