Switch from Nz prefix to namespace Nz for linux

Former-commit-id: 64eeaf3c633254b04910ebd4576fd9e910002be0

include/Nazara/Utility/WindowHandle.hpp

@@ -8,14 +8,16 @@
 #define NAZARA_WINDOWHANDLE_HPP
 
 #include <Nazara/Prerequesites.hpp>
+#if defined(NAZARA_PLATFORM_X11)
+#include <xcb/xcb.h>
+#endif
 
 namespace Nz
 {
 	#if defined(NAZARA_PLATFORM_WINDOWS)
 	// http://msdn.microsoft.com/en-us/library/aa383751(v=vs.85).aspx
 	typedef void* WindowHandle;
-	#elif defined(NAZARA_PLATFORM_LINUX)
-	#include <xcb/xcb.h>
+	#elif defined(NAZARA_PLATFORM_X11)
 	// http://en.wikipedia.org/wiki/Xlib#Data_types
 	using WindowHandle = xcb_window_t;
 	#else