msgb.c: Style cleanup in initialization

Don't assign the same var twice & init all from the same source.
tree: 69c932d6318ed4cf3a854d27b3a7a7d535dbe7f0
  1. tests/
  2. .gitignore
  3. configure.in
  4. COPYING
  5. libosmocore.pc.in
  6. Makefile.am