corrected join procedure at member

member.c

@@ -259,6 +259,8 @@ int member_joinfinish(char *buffer) {
             0 != ecdaa_credential_FP256BN_serialize_file(member_credential_file, &member.cred)) {
         printf("issuer_setup: Error saving key-pair or credential to disk\n");
         ret = -1;
+    } else {
+      ret = 1;
     }
     return ret;
 }