From a5abe031ca2daa3f090de6acb5750cd2dacbae33 Mon Sep 17 00:00:00 2001
From: Aaron Giles <aaron@aarongiles.com>
Date: Thu, 5 Jun 2008 09:36:23 +0000
Subject: [PATCH] It is now an actual error to have duplicate input bits.

---
 src/emu/validity.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/emu/validity.c b/src/emu/validity.c
index b0141747d1d..58e2c8daf8a 100644
--- a/src/emu/validity.c
+++ b/src/emu/validity.c
@@ -1211,7 +1211,10 @@ static int validate_inputs(int drivnum, const machine_config *config)
 	/* allocate the input ports */
 	portlist = input_port_config_alloc(driver->ipt, errorbuf, sizeof(errorbuf));
 	if (errorbuf[0] != 0)
+	{
 		mame_printf_error("%s: %s has input port errors:\n%s\n", driver->source_file, driver->name, errorbuf);
+		error = TRUE;
+	}
 
 	/* check for duplicate tags */
 	for (port = portlist; port != NULL; port = port->next)