[PATCH] Fixed obj_map_cmp when the difference between key and entry

[Francisco Casas]

> From 2034bd429c5ab345d480c7faeb8ee2185d3449e4 Mon Sep 17 00:00:00 2001

From: Francisco Casas 
Date: Fri, 22 Oct 2021 11:09:44 -0300
Subject: [PATCH] Fixed obj_map_cmp when the difference between key and entry
 is too large.

e.g. The substraction:

000000000A0A009F - FFFFFFFF9910019E

doesn't result in -1 as it should.

Signed-off-by: Francisco Casas 
---
 dlls/gdi32/objects.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/gdi32/objects.c b/dlls/gdi32/objects.c
index 4b390aa0160..3eebaef31cc 100644
--- a/dlls/gdi32/objects.c
+++ b/dlls/gdi32/objects.c
@@ -178,7 +178,11 @@ DWORD WINAPI GetObjectType( HGDIOBJ handle )
 static int obj_map_cmp( const void *key, const struct wine_rb_entry *entry )
 {
     struct obj_map_entry *obj_entry = WINE_RB_ENTRY_VALUE( entry, struct obj_map_entry, entry );
-    return HandleToLong( key ) - HandleToLong( obj_entry->obj );
+    LONG32 a = HandleToLong( key );
+    LONG32 b = HandleToLong( obj_entry->obj );
+    if(a>b) return 1;
+    if(a<b) return -1;
+    return 0;
 };

struct wine_rb_tree obj_map = { obj_map_cmp };