FVWM: '--' key action has stopped working in the master

Alexander Gromnitsky <[email protected]>
Newsgroups gmane.comp.window-managers.fvwm
Organization A poorly-installed InterNetNews site
Message-ID <[email protected]> 
So I have

  Key F4 A  M Close

in .fvwm2rc for closing any window on Alt-F4. But I want the xterm app
to be exempt from such a treatment.

W/ fvwm-2.6.5, this configuration has been working flawlessly for me:

  $ cat ~/.fvwm/.fvwm2rc 
  Key F4 A  M Close
  Key (XTerm) F4 A  M --

  $ grep allowSendEvents ~/.Xdefaults 
  XTerm*allowSendEvents: true

Today I've built fvwm from the master branch & have noticed that the
above trick doesn't work any more--the xterm window gets closed when I
press Alt-F4.

What could be the culprit?
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