Include Windows.h in npapi.h on Win32.
Include Windows.h in npapi.h on Win32.

Again, I don't like changing the NPAPI SDK, but this was a necessary change
to get Nixysa working.  I have decided that changing the NPAPI SDK is a far
lesser evil than changing Nixysa.

AlexSc/HelloWorld,AlexSc/HelloWorld,AlexSc/HelloWorld