David Brownell <david-b@pacbell.net> Minor code bugfix: check right variable.

Via code review by Steve Grubb <sgrubb@redhat.com> 

Almost innocuous; this is value is checked later, this
check being wrong would make it check stack garbage.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2655 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/flash/davinci_nand.c

@@ -663,7 +663,7 @@ static int davinci_nand_device_command(struct command_context_s *cmd_ctx,
 	}
 
 	aemif = strtoul(argv[4], &ep, 0);
-	if (*ep || chip == 0 || chip == ULONG_MAX) {
+	if (*ep || aemif == 0 || aemif == ULONG_MAX) {
 		LOG_ERROR("Invalid AEMIF controller address %s", argv[4]);
 		goto fail;
 	}