sgsn_test: Fix missing = in == type check

Change-Id: I696a7d25d2f4d19922e05a7e83c4aeec5c44fb07
Fixes: Coverity CID 135156
1 file changed
tree: 0e2d18eddcb8cfd3d4c0cc4f0ebec64ee4b233e9
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap