nat: number could point to an address on the stack that can be reused

The number = int_number assignment will make the number point to
the stack and as the int_number goes out of scope at the end of
the if statement other code could re-use this stack for other memory.

Fixes: Coverity CID 1042325
1 file changed
tree: 781b45edad663eb099f08b14758557c1bf3cce73
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README