gsm_subscriber: Fix compiler warning of the printf string

This fixes both a GCC and a Coverity warning:

GCC:
gsm_subscriber.c: In function ‘subscr_expire_callback’:
gsm_subscriber.c:389:2: warning: format ‘%i’ expects argument of type ‘int’, but argument 8 has type ‘long long unsigned int’ [-Wformat]

Coverity:
CID 1040712
1 file changed
tree: 1e4aa875c86de0522d777a42cd6e09e3f3c91e65
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README