[WIN32SS/(kbswitch)] CheckMenuItem() menu index off by one!!! PATCH

win32ss\user\ntuser\menu.c::990
IntCheckMenuItem(PMENU MenuObject, UINT uIDCheckItem, UINT uCheck)

has an OFF-BY-ONE issue in IN-parameter 'uIDCheckItem':
when calling
(void)CheckMenuItem(hMenu, 2, MF_CHECKED);

When you call this on Windows, the second item in the menu is checked (correct)
When you call this on ROS, the first item in the menu is checked (wrong)

I verified that by a cross test!

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You can see this symptom in ros-kbswitch-tool when checking active keyboard layout!
Works on Windows, but always sets the checkbox off-by-one in ros

base\applications\kbswitch\kbswitch.c::328
calls (void)CheckMenuItem(hMenu, ulCurrentLayoutNum, MF_CHECKED);