imgdev: reset action_result after reporting it
imgdev: reset action_result after reporting it

Otherwise we end up in reporting the same result on next iteration.

rmarku/libfprint,zemen/libfprint,rmarku/libfprint,zemen/libfprint,iafilatov/libfprint,anarsoul/libfprint,anarsoul/libfprint,zemen/libfprint,rmarku/libfprint