Bug#1082679: freedoom: FTBFS with .dsc from archive: mis-detects that deutex does not support PNG

[Santiago Vila]

Hmm, I forgot to Cc: the bug address itself for this message.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1082679;msg=29

To summarize: --no-parallel fixes the problem for me, and I believe
it's a good enough fix.

Thanks.