SDL: Fixed raw input device GUIDs changing randomly between runs (cd673)

SDL Commits
1 
From cd673c82544d3e338999f5e646f06ce3be4ee4ee Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 17 Mar 2025 13:54:56 -0700
Subject: [PATCH] Fixed raw input device GUIDs changing randomly between runs

On Windows 11, apparently HidD_GetManufacturerString() and HidD_GetProductString() can return TRUE without actually filling in any string data.

Fixes https://github.com/libsdl-org/SDL/issues/12566

(cherry picked from commit 4fc9509ab776ffe535320ea3b1296ecfdea2c32f)
---
 src/joystick/windows/SDL_rawinputjoystick.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/joystick/windows/SDL_rawinputjoystick.c b/src/joystick/windows/SDL_rawinputjoystick.c
index d5166def0a881..d135382e5dcd4 100644
--- a/src/joystick/windows/SDL_rawinputjoystick.c
+++ b/src/joystick/windows/SDL_rawinputjoystick.c
@@ -909,9 +909,11 @@ static void RAWINPUT_AddDevice(HANDLE hDevice)
         char *product_string = NULL;
         WCHAR string[128];
 
+        string[0] = 0;
         if (SDL_HidD_GetManufacturerString(hFile, string, sizeof(string))) {
             manufacturer_string = WIN_StringToUTF8W(string);
         }
+        string[0] = 0;
         if (SDL_HidD_GetProductString(hFile, string, sizeof(string))) {
             product_string = WIN_StringToUTF8W(string);
         }