bug#7348: 23.2.50; Emacs crashes on fast window resize with scrollbars on under OSX

[Eli Zaretskii]

> From: Jan Djärv <jan.h.d@swipnet.se>
> Cc: Jakub Turski <yacoob@gmail.com>, 7348@debbugs.gnu.org
> 
> Some timing has changed.  I got a crash because of BadCursor.  It only 
> happens 
> if you start Emacs and put the mouse fast within the frame on a non-toolkit 
> build.  Initializing cursor to No_Cursor in 
> note_mode_line_or_margin_highlight 
> fixed tha.

Looks like it's my fault.  Sorry, and thanks for fixing that.