[Serdev] off-by-one error in config part of gflags module

[Hendrik Scholz]

Hi!

I intended to protect a code block using is_gflag() on a post-Ottendorf
SER but ran into an off by one bug:

Inside ser.cfg I check for gflag 1:
if (is_gflag(1)) { ... }

After startup is_gflag() fails as expected. Now I set flag '1':

  # sercmd gflags.dump | head -2
  0
  0
  # sercmd gflags.set 1
  # sercmd gflags.dump | head -2
  0
  1
  #

At this point the code block is not executed but if I go ahead
and set flag '0' is for sure is:

  # sercmd gflags.set 0
  # sercmd gflags.dump | head -2
  1
  1
  #

I don't have the time to dig into this but it's not what I expect
it to do ;)

Cheers,
 Hendrik

P.S.: tracker.iptel.org doesn't like me right now therefore I'll
      file the bug later.

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