Better underrun handling and checking return values now.

No longer needed since winealsa has fallbacks now for both.

Deadlock, off-by-one and forgetting to declare that we want MMAP
access, so accelerated mode wouldn't work at all but fail silently.

mshtml.idl: Moved IHTMLDOMConstructor dispinterface declaration to macro and add it to all element types.

mshtml.idl: Moved IElementSelector dispinterface declaration to macro and added it to all element types with data.