stop_sample  -  Stops  a  sample from playing. Allegro game programming
       library.
       #include <allegro.h>
       void stop_sample(const SAMPLE *spl);
       Stop a sample from playing, which is required if you have set a  sample
       going  in  looped  mode.  If  there  are  several  copies of the sample
       playing, it will stop them all. You must still destroy the sample using
       destroy_sample().
       play_sample(3alleg), destroy_sample(3alleg)