Fix bad includes in snowballs, re #43

--HG--
branch : multipass-stereo

code/snowballs2/client/src/commands.cpp

@@ -35,7 +35,7 @@
 #include <nel/3d/u_3d_mouse_listener.h>
 #include <nel/3d/u_material.h>
 #include <nel/3d/u_landscape.h>
-#include <nel/3d/stereo_ovr.h>
+#include <nel/3d/stereo_hmd.h>
 
 #include "network.h"
 #include "snowballs_client.h"

code/snowballs2/client/src/compass.cpp

@@ -28,7 +28,7 @@
 #include <nel/3d/u_driver.h>
 #include <nel/3d/u_text_context.h>
 #include <nel/3d/u_texture.h>
-#include <nel/3d/stereo_ovr.h>
+#include <nel/3d/stereo_hmd.h>
 
 #include "mouse_listener.h"
 #include "camera.h"

code/snowballs2/client/src/snowballs_client.cpp

@@ -51,7 +51,7 @@
 #if SBCLIENT_DEV_STEREO
 #	include <nel/3d/stereo_render.h>
 #endif /* #if SBCLIENT_DEV_STEREO */
-#include <nel/3d/stereo_ovr.h>
+#include <nel/3d/stereo_hmd.h>
 
 // Project includes
 #include "pacs.h"