patch for debug segfault

[Tom H. <tom...@ad...>]

Tried to send this a few days ago and adelphia mail was screwy,
lets see if it works this time:

On x86_64, the va_start and va_end varargs stuff is highly nontrivial
internally. The way it was being used in the logging code causes
a segfault when it goes through the path that tries to log to two
different places. I'm attaching the patch I came up with to get
debugging to work on my Fedora Core 5 x86_64 with lirc 0.8.0. It
does a separate va_start and va_end for each use instead of one
around both uses.