From aca206f7e90f92e999d94f46ed198c3bcd735dbb Mon Sep 17 00:00:00 2001
From: Peter Robinson <pbrobinson@gmail.com>
Date: Fri, 28 Jun 2019 11:51:58 +0100
Subject: [PATCH] Use signed char for variable

Architectures other than x86 don't by default treat char as signed so
be explicit so the build doesn't fail when building on other arches
such as Arm.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
---
 main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main.cpp b/main.cpp
index 956e0ca..a9a88bb 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1882,7 +1882,7 @@ bool upgrade_loader(STRUCT_RKDEVICE_DESC &dev, char *szLoader)
 	CRKComm *pComm = NULL;
 	bool bRet, bSuccess = false;
 	int iRet;
-	char index;
+	signed char index;
 	USHORT usFlashDataSec, usFlashBootSec;
 	DWORD dwLoaderSize, dwLoaderDataSize, dwDelay, dwSectorNum;
 	char loaderCodeName[] = "FlashBoot";