Merged from trunk:
2011-07-01  Jacek Caban  <jacek@codeweavers.com>  (rev. 4235)
* winnt.h (FORCEINLINE): Define without extern for __cplusplus.
2011-07-01  Ozkan Sezer  <sezeroz@gmail.com>  (rev. 4238)
* ntdef.h (FORCEINLINE): Mirror the __GNUG__ case of FORCEINLINE
definition in ntdef.h.

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/branches/releases/v1.0@4239 4407c894-4637-0410-b4f5-ada5f102cad1