(svn r11520) -Fix: [OSX] The cocoa video driver let the mouse cursor escape the window when using rmb scrolling. Thanks ln- for pointing this out and providing a fix.

src/video/cocoa/event.mm

@@ -430,7 +430,6 @@ static bool QZ_PollEvent()
 	switch ([event type]) {
 		case NSMouseMoved:
 		case NSOtherMouseDragged:
-		case NSRightMouseDragged:
 		case NSLeftMouseDragged:
 			pt = _cocoa_subdriver->GetMouseLocation(event);
 			if (!_cocoa_subdriver->MouseIsInsideView(&pt) &&
@@ -444,6 +443,12 @@ static bool QZ_PollEvent()
 			QZ_MouseMovedEvent((int)pt.x, (int)pt.y);
 			break;
 
+		case NSRightMouseDragged:
+			pt = _cocoa_subdriver->GetMouseLocation(event);
+			QZ_HideMouse();
+			QZ_MouseMovedEvent((int)pt.x, (int)pt.y);
+			break;
+
 		case NSLeftMouseDown:
 		{
 			uint32 keymask = 0;