Hi,

Here's a fix.  It would be nice if you will try this.

Sincerely,
Seiji

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2008-06-21 Seiji Zenitani <zenitani@mac.com>, Ryo Yoshitake <ryo@shiftmode.net>
	
	* xterm.c (x_set_frame_alpha): Add x_catch_errors for bug#437.