Fix to clang warnings
Fix to clang warnings

pkcs11_lib.c:1323:3: warning: Value stored to 'rv' is never read
  rv = -1;
  ^    ~~
pkcs11_lib.c:1346:3: warning: Value stored to 'rv' is never read
  rv = -1;
  ^    ~~


OpenSC/pam_pkcs11,milgner/pam_pkcs11,milgner/pam_pkcs11,milgner/pam_pkcs11,OpenSC/pam_pkcs11