Fix another defbtn 'no'

rsrc/dialogs/delete-pc-confirm.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='UTF-8' standalone='no'?>
 <!-- NOTE: This file should be updated to use relative positioning the next time it changes. -->
 <?xml-stylesheet href="dialog.xsl" type="text/xsl"?>
-<dialog defbtn='no'>
+<dialog escbtn='no' defbtn='yes'>
 	<pict type='dlog' num='7' top='6' left='6'/>
 	<text top='6' left='48' width='249' height='67'>
 		You are about to consign this character to the eternal void.<br/>