SDL_image: Fix loading of 4-bit .ico files

SDL Commits
1 
From b740b68946de9f3952617d252192fac90c6edb9e Mon Sep 17 00:00:00 2001
From: Tad Hardesty <[EMAIL REDACTED]>
Date: Sun, 29 Jan 2023 15:04:23 -0800
Subject: [PATCH] Fix loading of 4-bit .ico files

---
 IMG_bmp.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/IMG_bmp.c b/IMG_bmp.c
index 2b9dc7b4..33a51a17 100644
--- a/IMG_bmp.c
+++ b/IMG_bmp.c
@@ -240,7 +240,6 @@ LoadICOCUR_RW(SDL_RWops * src, int type, int freesrc)
         case 1:
         case 4:
             ExpandBMP = biBitCount;
-            biBitCount = 8;
             break;
         case 8:
             ExpandBMP = 8;