audio/pulseaudio-module-sndio: Fix an error on loading

• Enabling this module in LOCALBASE/etc/pulse/default.pa.d/* pulseaudio prints this error on loading:

Aug 29 14:33:26 * pulseaudio[3024]: [] module.c: Module "module-sndio" version (0.0) doesn't match the expected version (16.1).

This patch fix the module version making it the same as pulseaudio's.
The latter is retrieved via pkg-config.

• Pet portclippy
• Bump PORTREVISION