bsc_ctrl: Ensure we don't pass NULL string into strtok_r()

Change-Id: I03bea132377c0136b55b6fdad99a5d92da12e692
Fixes: Coverity CID 135180
1 file changed
tree: 963c498c6a81cd29a67bd51106f057e848e86466
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap