osmux: fix error path in osmux_handle_dummy()

This patch adds a missing goto err. While at it, reword log message.
1 file changed
tree: 4dca56ed4cd40042f7d4bbc6285873461084cef9
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README