[AD] missing xlock

[Elias Pschernig <elias@xxxxxxxxxx>]

The attached patch fixes a missing XLOCK/XUNLOCK pair in the X11 version
of mouse_driver->select_system_cursor.

-- 
Elias Pschernig

Index: src/x/xmouse.c
===================================================================
RCS file: /cvsroot/alleg/allegro/src/x/xmouse.c,v
retrieving revision 1.8
diff -u -p -r1.8 xmouse.c
--- src/x/xmouse.c	4 Dec 2004 13:24:17 -0000	1.8
+++ src/x/xmouse.c	14 Mar 2005 13:53:16 -0000
@@ -238,14 +238,18 @@ static int _xwin_select_system_cursor(AL
       default:
          return 0;
    }
-   
+
+   XLOCK();
+
    if (_xwin.cursor != None) {
       XUndefineCursor(_xwin.display, _xwin.window);
       XFreeCursor(_xwin.display, _xwin.cursor);
-   }   
+   }
 
    _xwin.cursor = XCreateFontCursor(_xwin.display, _xwin.cursor_shape);
    XDefineCursor(_xwin.display, _xwin.window, _xwin.cursor);
-   
+
+   XUNLOCK();
+
    return cursor;
 }