[fvwmorg/fvwm] 69d35e: FvwmRearrange: fix compilation warning

Thomas Adam <[email protected]>
Newsgroups gmane.comp.window-managers.fvwm.devel
Message-ID <5a9a86593c484_5a572b0e9bf6fc002111a@hookshot-fe-cace476.cp1-iad.github.net.mail> 
  Branch: refs/heads/master
  Home:   https://github.com/fvwmorg/fvwm
  Commit: 69d35e84330f47191bd3dbe25eef7a330fcc4537
      https://github.com/fvwmorg/fvwm/commit/69d35e84330f47191bd3dbe25eef7a330fcc4537
  Author: Thomas Adam <[email protected]>
  Date:   2018-03-03 (Sat, 03 Mar 2018)

  Changed paths:
    M modules/FvwmRearrange/FvwmRearrange.c

  Log Message:
  -----------
  FvwmRearrange: fix compilation warning

Fix the fact that a given if statement was ambiguous without braces.
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