EnumFontFamilies(NULL) should not enumerate substituted fonts,
but EnumFontFamilies("MS Shell Dlg") should do.

user32: Add a test to show that fonts returned by SystemParametersInfo(SPI_GETNONCLIENTMETRICS) should be listed by EnumFontFamilies(hdc, NULL).

When threads are killed with SIGQUIT some locks can be in an undefined
state, and it not safe to call exit handlers.