mgcp_osmux.c: osmux_enable_endpoint: Fix incorrect return check

osmux_xfrm_input_open_circuit returns 0 on success and -1 on error.
Confusion comes from that function being implemented by calling
osmux_batch_add_circuit which returns NULL on error.

Change-Id: I98700aa1e2fab9784706bfac1a47cc84635172b7
1 file changed
tree: f5ee3d2fd1ad46f282f100e48451cc61d9905117
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap