[sr-dev] git:master:1db19f16: auth_radius: fix compilation warning

authorize.c:110:8: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_NONCE_REUSED; ~ ^~~~~~~~~~~~~~~~~ authorize.c:114:8: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_STALE_NONCE; ~ ^~~~~~~~~~~~~~~~ authorize.c:120:8: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_ERROR; ~ ^~~~~~~~~~ authorize.c:124:8: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_NO_CREDENTIALS; ~ ^~~~~~~~~~~~~~~~~~~ authorize.c:131:8: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_OK; ~ ^~~~~~~ authorize.c:148:9: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_ERROR; ~ ^~~~~~~~~~ authorize.c:153:12: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_ERROR; ~ ^~~~~~~~~~ authorize.c:159:12: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_ERROR;; ~ ^~~~~~~~~~ authorize.c:186:12: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_ERROR; ~ ^~~~~~~~~~ authorize.c:189:12: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_OK; ~ ^~~~~~~ authorize.c:193:8: warning: implicit conversion from enumeration type 'enum auth_cfg_result' to different enumeration type 'auth_result_t' (aka 'enum auth_result') [-Wenum-conversion] ret = AUTH_INVALID_PASSWORD; ~ ^~~~~~~~~~~~~~~~~~~~~ 11 warnings generated.