SDL_ttf: Fixed build warning

SDL Commits
1 
From f94594c2a3f27c39edd41661ff8460e4c5884398 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sat, 7 Dec 2024 07:42:38 -0800
Subject: [PATCH] Fixed build warning

---
 src/SDL_ttf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SDL_ttf.c b/src/SDL_ttf.c
index 80024fe9..521a6b73 100644
--- a/src/SDL_ttf.c
+++ b/src/SDL_ttf.c
@@ -3887,7 +3887,7 @@ static int CalculateClusterLengths(TTF_Text *text, TTF_SubString *clusters, int
             cluster->length = clusters[i + 1].offset - cluster->offset;
         } else {
             SDL_assert(cluster->flags & TTF_SUBSTRING_TEXT_END);
-            SDL_assert(cluster->offset == length);
+            SDL_assert(cluster->offset == (int)length);
         }
         last = cluster;
     }