Fix another memory leak on malloc fail

src/cli_microrl.c

@@ -163,6 +163,10 @@ void cli_rfid_add(const char *const *argv)
         card.uid_size = uid.size;
         memcpy(&card.uid, &uid.uidByte, uid.size);
         char *user = malloc(strlen(argv[1]) + 1);
+        if(!user) {
+            printf_P(PSTR(OUT_OF_MEMORY_MSG "\n"));
+            return;
+        }
         strcpy(user, argv[1]);
         card.user = user;
         rfid_add_card(&card);

src/rfid.c

@@ -72,6 +72,8 @@ void rfid_add_card(const card_t *card)
     new_card_user = malloc(strlen(card->user) + 1);
     if (!new_card || !new_card_user) {
         printf_P(PSTR(OUT_OF_MEMORY_MSG "\n"));
+        free(new_card_user);
+        free(new_card);
         return;
     }