feat(legacy): Warn only once about non-standard paths.

[no changelog]

legacy/firmware/signing.c

@@ -1389,12 +1389,14 @@ static bool signing_add_input(TxInputType *txinput) {
       return false;
     }
 
+    if (!foreign_address_confirmed) {
       if (!fsm_layoutPathWarning()) {
         signing_abort();
         return false;
       }
       foreign_address_confirmed = true;
     }
+  }
 
   if (!fill_input_script_pubkey(coin, &root, txinput)) {
     fsm_sendFailure(FailureType_Failure_ProcessError,