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

@@ -42,8 +42,8 @@ card_t* rfid_find_card(const card_t *card)
         card_t *current;
         current = head;
         while (current != NULL) {
-            if (((current->uid_size == card->uid_size) &&
+            if ((current->uid_size != card->uid_size) ||
-                    !memcmp(current->uid, card->uid, current->uid_size)) ||
+                    !memcmp(current->uid, card->uid, current->uid_size) ||
                     ((card->user != NULL) && !strcmp(current->user, card->user))) {
 
                 return current;