SDL: Fixed build (7abac)

From 7abacc9f9f17aa2980336fb467be2be42bfce5c2 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 16 Nov 2023 11:44:59 -0800
Subject: [PATCH] Fixed build

---
 src/joystick/apple/SDL_mfijoystick.m | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/joystick/apple/SDL_mfijoystick.m b/src/joystick/apple/SDL_mfijoystick.m
index 29039d79a1c9..92299ad76a15 100644
--- a/src/joystick/apple/SDL_mfijoystick.m
+++ b/src/joystick/apple/SDL_mfijoystick.m
@@ -50,6 +50,7 @@
 
 static id connectObserver = nil;
 static id disconnectObserver = nil;
+static NSString *GCInputXboxShareButton = @"Button Share";
 
 #include <Availability.h>
 #include <objc/message.h>
@@ -419,7 +420,7 @@ static BOOL IOS_AddMFIJoystickDevice(SDL_JoystickDeviceItem *device, GCControlle
         if (controller.physicalInputProfile.buttons[GCInputXboxPaddleOne] != nil) {
             device->has_xbox_paddles = SDL_TRUE;
         }
-        if (controller.physicalInputProfile.buttons[@"Button Share"] != nil) {
+        if (controller.physicalInputProfile.buttons[GCInputXboxShareButton] != nil) {
             device->has_xbox_share_button = SDL_TRUE;
         }
     }
@@ -626,7 +627,7 @@ static BOOL IOS_AddMFIJoystickDevice(SDL_JoystickDeviceItem *device, GCControlle
                 device->button_mask |= (1 << SDL_GAMEPAD_BUTTON_LEFT_PADDLE2);
                 ++nbuttons;
             }
-            if (controller.physicalInputProfile.buttons[@"Button Share"] != nil) {
+            if (controller.physicalInputProfile.buttons[GCInputXboxShareButton] != nil) {
                 device->has_xbox_share_button = SDL_TRUE;
                 device->button_mask |= (1 << SDL_GAMEPAD_BUTTON_MISC1);
                 ++nbuttons;
@@ -1270,7 +1271,7 @@ static void IOS_MFIJoystickUpdate(SDL_Joystick *joystick)
             }
 
             if (device->has_xbox_share_button) {
-                buttons[button_count++] = controller.physicalInputProfile.buttons[@"Button Share"].isPressed;
+                buttons[button_count++] = controller.physicalInputProfile.buttons[GCInputXboxShareButton].isPressed;
             }
 #endif
 #pragma clang diagnostic pop