user32: Refine the size calculations for menu items with HBMMENU_POPUP magic bitmaps with some conformance tests.

widl: Only classify top-level pointers as ref pointers if they don't have any other pointer attributes.

Print a warning if a pointer attribute is specified since the
generated code won't do what the developer expects.

It should be key, not subkey being passed into RegSetValueExW.

imm32: Fix crash in DllMain when FreeLibrary is called from a thread which existed before the DLL was loaded.

The code in IMM_FreeThreadData shouldn't assume that thread data will
always have been created, so check for NULL data.

Make loading the DLL more robust against errors.