Make key-release events also show the correct Char value on Windows (thx...

Make key-release events also show the correct Char value on Windows (thx @zerochen for report+fix here: http://irrlicht.sourceforge.net/forum/viewtopic.php?f=7&t=49499)

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4670 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CIrrDeviceWin32.cpp

@@ -797,7 +797,7 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 			// Handle unicode and deadkeys in a way that works since Windows 95 and nt4.0
 			// Using ToUnicode instead would be shorter, but would to my knowledge not run on 95 and 98.
 			WORD keyChars[2];
-			UINT scanCode = HIWORD(lParam);
+			UINT scanCode = HIWORD(lParam) & 0x7FFF;
 			int conversionResult = ToAsciiEx(wParam,scanCode,allKeys,keyChars,0,KEYBOARD_INPUT_HKL);
 			if (conversionResult == 1)
 			{