[mythtv] Problems getting qmake to generate dependencies

[Geoffrey Hausheer]

Does anyone understand how qmake works?

I've read all the docs, and as far as I can tell mythtranscode.pro is
corrct, but qmake is not generating the propper dependencies for
mpeg2fix.cpp.  It only includes avformat.h and not mpeg2.h, avcodec.h
or (most importantly) replex/multiplex.h, replex/mpg_common.h, and
replex/ringbuffer.h (all included from within mpeg2fix.h)

I have no idea why, but it causes mythtranscode to be built
incorrectly when those header files change, causing users to see bugs
that I can't reproduce.

.Geoff