Compiles again on OSX.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4277 0c269be4-1314-0410-8aa9-9f06e86f4224

common/JackLibGlobals.h

@@ -32,12 +32,14 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 #include <assert.h>
 #include <signal.h>
 
+#ifdef WIN32
 #ifdef __MINGW32__
 #include <sys/types.h>
 typedef _sigset_t sigset_t;
 #else
 typedef HANDLE sigset_t;
 #endif
+#endif
 
 namespace Jack
 {