Minor include fix for OSX by grafikrobot.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1355 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COSOperator.cpp

@@ -12,6 +12,8 @@
 #include <unistd.h>
 #ifdef _IRR_USE_OSX_DEVICE_
 #include "OSXClipboard.h"
+#endif
+#ifdef _IRR_OSX_PLATFORM_
 #include <sys/types.h>
 #include <sys/sysctl.h>
 #endif