stub header files don't work with the MS C compiler

Specifically we need to conditionalise the stdcall annotation, using __attribute__((__stdcall__)) for gcc and and __stdcall for Microsoft's compiler.

See http://blogs.msdn.com/b/satnam_singh/archive/2011/04/19/creating-a-windows-dll-from-a-haskell-program-and-calling-it-from-c.aspx

Trac metadata

Trac field	Value
Version	7.0.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown/Multiple
Architecture