ENGINE-457 - mem leak in is_pep_user

src/pEpEngine.c

@@ -2717,6 +2717,8 @@ DYNAMIC_API PEP_STATUS is_pep_user(PEP_SESSION session, pEp_identity *identity,
     }
 
     sqlite3_reset(session->is_pep_user);
+    
+    free(alias_default);
     return PEP_STATUS_OK;
 }