bug#17171: crash in ns_read_socket

[Greg Smolyn]

So I thought it might be a race condition of some sort, so I enclosed the apploopnr checks with an @synchronize, like so:

3636      @synchronized([NSApp class]) {

3637          if (++apploopnr != 1)

3638              {

3639                  emacs_abort ();

3640              }

3641          [NSApp run];

3642          --apploopnr;

3643      }

Sadly, still crashes.

I may have done the synchronize incorrectly, I am not really a cocoa / objc programmer.