Apply safe part of supermat's patch to let STK build on clang on OSX. The part about long GLuint remains to be seen, not too sure what to do about it

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14344 178a84e3-b1eb-0310-8ba1-8eac791a3b58

lib/irrlicht/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.h

@@ -19,9 +19,11 @@
 #include <OpenGL/OpenGL.h>
 #include <map>
 
+#ifndef __OBJC__
 class NSWindow;
 class NSOpenGLContext;
 class NSBitmapImageRep;
+#endif
 
 namespace irr
 {

src/utils/random_generator.hpp

@@ -21,6 +21,7 @@
 
 #include <algorithm>
 #include <vector>
+#include <stdlib.h>
 
 /** A random number generator. Each objects that needs a random number uses
     its own number random generator. They are all seeded with number provided