trau_frame: Add missing break statement in osmo_trau_frame_encode()
trau_frame: Add missing break statement in osmo_trau_frame_encode()

Change-Id: I986781218a844e043b6206124696452b3afec7fd
Closes: CID#211592

osmocom/libosmo-abis,osmocom/libosmo-abis,osmocom/libosmo-abis