Add a fix for working fesetenv in libquadmath-library


git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6423 4407c894-4637-0410-b4f5-ada5f102cad1
fix UINT argument, patch by Sergei Antonov <saproj at gmail dort com>

git-svn-id: https://svn.code.sf.net/p/mingw-w64/code@6424 4407c894-4637-0410-b4f5-ada5f102cad1