Ignore WM_SYSCOMMAND - SC_KEYMENU as it didn't actually show the menu anyway,...

Ignore WM_SYSCOMMAND - SC_KEYMENU as it didn't actually show the menu anyway, so having ALT and F10 key back under Irrlicht control is probably the better solution for now.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3298 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CIrrDeviceWin32.cpp

@@ -447,8 +447,11 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 	case WM_SYSCOMMAND:
 		// prevent screensaver or monitor powersave mode from starting
 		if ((wParam & 0xFFF0) == SC_SCREENSAVE ||
-			(wParam & 0xFFF0) == SC_MONITORPOWER)
+			(wParam & 0xFFF0) == SC_MONITORPOWER ||
+			(wParam & 0xFFF0) == SC_KEYMENU
+			)
 			return 0;
+
 		break;
 
 	case WM_ACTIVATE: