SDL: Fixed macOS framework detection in sdl2.m4 (531dd)

SDL Commits
1 
From 531ddf5eb531fd3782ffea445cadbfe4fd7d69d3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Fri, 26 Aug 2022 09:12:56 -0700
Subject: [PATCH] Fixed macOS framework detection in sdl2.m4

Fixes https://github.com/libsdl-org/SDL/issues/6141
(cherry picked from commit 3d516b841a5c643e049804c72c9193229535fb30)
---
 sdl2.m4 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sdl2.m4 b/sdl2.m4
index 710c2516e7c..75b60f6ea93 100644
--- a/sdl2.m4
+++ b/sdl2.m4
@@ -70,8 +70,8 @@ AC_ARG_VAR(SDL2_FRAMEWORK, [Path to SDL2.framework])
         sdl_framework=$SDL2_FRAMEWORK
       else
         for d in / ~/ /System/; do
-          if test -d "$dLibrary/Frameworks/SDL2.framework"; then
-            sdl_framework="$dLibrary/Frameworks/SDL2.framework"
+          if test -d "${d}Library/Frameworks/SDL2.framework"; then
+            sdl_framework="${d}Library/Frameworks/SDL2.framework"
           fi
         done
       fi