wined3d: Small rhw vertex fix.

Fix the one pixel displacement and move the glOrtho code in a common
function.
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index a0a4414..7e53955 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -597,8 +597,7 @@
     DWORD size;
 } PrivateData;
 
-/* OpenGL ortho matrix setup */
-void d3ddevice_set_ortho(IWineD3DDeviceImpl *This, BOOL dontclip);
+void d3ddevice_set_ortho(IWineD3DDeviceImpl *This);
 
 /*****************************************************************************
  * IWineD3DResource implementation structure