SDL: SDL_hidapi_wii.c: fix -Wpointer-sign warnings

From 5be157b3a2198d4d647a36508e2fa51b51b16d1c Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 2 Sep 2022 19:33:40 +0300
Subject: [PATCH] SDL_hidapi_wii.c: fix -Wpointer-sign warnings

---
 src/joystick/hidapi/SDL_hidapi_wii.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/joystick/hidapi/SDL_hidapi_wii.c b/src/joystick/hidapi/SDL_hidapi_wii.c
index be030dfaf8e..9fce4902faa 100644
--- a/src/joystick/hidapi/SDL_hidapi_wii.c
+++ b/src/joystick/hidapi/SDL_hidapi_wii.c
@@ -280,13 +280,13 @@ static SDL_bool ReadRegister(SDL_DriverWii_Context *ctx, Uint32 address, int siz
 
 static SDL_bool SendExtensionIdentify1(SDL_DriverWii_Context *ctx, SDL_bool sync)
 {
-    char data = 0x55;
+    unsigned char data = 0x55;
     return WriteRegister(ctx, 0xA400F0, &data, sizeof(data), sync);
 }
 
 static SDL_bool SendExtensionIdentify2(SDL_DriverWii_Context *ctx, SDL_bool sync)
 {
-    char data = 0x00;
+    unsigned char data = 0x00;
     return WriteRegister(ctx, 0xA400FB, &data, sizeof(data), sync);
 }