allegro searches for its plugins/modules in /usr/lib/allegro instead of
/usr/lib64/allegro

This can be seen in a strace, but also because it uses oss for sound instead of
alsa which is in a plugin. For the oss case start lacewing or overgod and then
do a dmesg, the output is:
application lacewing uses obsolete OSS audio interface

With this patch this goes away because allegro properly uses alsa. I did not
send this upstream.