pcm_set_frequency is ignored

[Joseph Garvin]

To shrink my plugin size I'm trying to convert my sound samples to be
22050hz instead of 44100. But when I do this the sound always plays too fast
like a chipmunk. I'm calling pcm_set_frequency(22050) but no matter what
number I give it (I tested crazy values like 100) I get the same result. It
always tries to play at 44100hz. I'm trying on the Sansa e200 simulator. Is
this a limitation of the simulator or maybe of the e200? If so it'd be nice
to get some sort of console warning.