veyron/services/wspr: returning from an error case to prevent panic
veyron/services/wspr: returning from an error case to prevent panic

Change-Id: I4ff768841f26f84279e60684362a8b5f4b2a78ff

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref