ff_mjpeg_decoder is now referenced directly by the relevant
decoders, so that the linker sees the dependency and
just does the desired thing. So remove the hack.
(Btw: The preprocessor does not do string comparisons, instead
undefined tokens in #if checks evaluate to 0, making the check
true regardless of the actual codec fuzzed (and leading to
linker errors if the mjpeg decoder is disabled).)
Reviewed-by: Kacper Michajlow <kasper93@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>