Added UI support to set OpenGL MultiSample.

Code to support it was lying around for long already, but not controlled by UI nicely.
Now you have in user preferences "System" tab an option to set it. 

NOTE:
- it only works saving as User startup.blend, and restart Blender.
- your system should support it, no check for it is visible in UI
- tested only on iMac OSX 10.7

Screenshot:
http://www.blender.org/bf/chinchilla.blend.png

1 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/windowmanager/intern/wm_window.c b/source/blender/windowmanager/intern/wm_window.c
index 616567e8184..87d80402af6 100644
--- a/source/blender/windowmanager/intern/wm_window.c
+++ b/source/blender/windowmanager/intern/wm_window.c
@@ -345,7 +345,7 @@ static void wm_window_add_ghostwindow(const char *title, wmWindow *win)
 	                              (GHOST_TWindowState)win->windowstate,
 	                              GHOST_kDrawingContextTypeOpenGL,
 	                              0 /* no stereo */,
-	                              0 /* no AA */);
+								  U.ogl_multisamples /* AA */);
 	
 	if (ghostwin) {
 		/* needed so we can detect the graphics card below */
@@ -373,7 +373,6 @@ static void wm_window_add_ghostwindow(const char *title, wmWindow *win)
 		
 		/* standard state vars for window */
 		glEnable(GL_SCISSOR_TEST);
-		
 		GPU_state_init();
 	}
 }