From 8bc4d1a94ef5583c39f3926fa6fdb6bdffe7e195 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Mon, 7 Sep 2009 16:04:44 +0000
Subject: [PATCH] Kenneth Bull to SDL

I noticed in trunk/SDL/src/video/win32/SDL_win32events.c, in this code here...

... if the device handle isn't found in mice[], which it won't be if
the mouse was plugged in after SDL_Init, then you end up with an
uninitialized value in index, which is then passed to various
SDL_SendMouse* functions.
---
 src/video/win32/SDL_win32events.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/video/win32/SDL_win32events.c b/src/video/win32/SDL_win32events.c
index 5dcbfa765..682832e05 100644
--- a/src/video/win32/SDL_win32events.c
+++ b/src/video/win32/SDL_win32events.c
@@ -236,7 +236,7 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
         {
             LPBYTE lpb;
             const RAWINPUTHEADER *header;
-            int index;
+            int index = -1;
             int i;
             int size = 0;
             const RAWMOUSE *raw_mouse = NULL;
@@ -261,6 +261,10 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
                     break;
                 }
             }
+            if (index < 0) {
+                /* New mouse?  Should we dynamically update mouse list? */
+                return (0);
+            }
 
             GetCursorPos(&point);
             ScreenToClient(hwnd, &point);