Emacs spin-loop in X -- fixed with cygwin1-20021114.dll snapshot

[David Starks-Browning]

Thanks so much Chris!  This seems to have done the trick.

I've been banging on /usr/bin/emacs in X11 with the 20021114 snapshot
and I have not been able to lock it up.  I will keep trying (I've been
fooled before) but it looks rock solid.

Gratefully,
David

> Modified files:
> 	cygwin         : ChangeLog exceptions.cc fhandler_console.cc 
> 	                 miscfuncs.cc sigproc.cc 
> 
> Log message:
> 	* exceptions.cc (setup_handler): Add debugging output.  Set thread priority to
> 	idle if pending signals to allow other threads to get into interruptible state.
> 	* miscfuncs.cc (sys_mbstowcs): Save current thread in variable to avoid an OS
> 	call.
> 	* wait.cc (wait_sig): Reset thread priority each time through loop since the
> 	priority may have been set down to deal with pending signals.


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