SDL: KMSDRM_Vulkan_CreateSurface(): fixed pointer-cast warning on 32 bit

SDL Commits
1 
From e97cfe4ad1f5ef5b52c76905312d85e861e92ca2 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 6 Apr 2021 23:56:10 +0300
Subject: [PATCH] KMSDRM_Vulkan_CreateSurface(): fixed pointer-cast warning on
 32 bit

Closes: https://github.com/libsdl-org/SDL/issues/4284
---
 src/video/kmsdrm/SDL_kmsdrmvulkan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video/kmsdrm/SDL_kmsdrmvulkan.c b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
index c101ead55..a47752948 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvulkan.c
+++ b/src/video/kmsdrm/SDL_kmsdrmvulkan.c
@@ -198,7 +198,7 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
     VkDisplaySurfaceCreateInfoKHR display_plane_surface_create_info;
 
     VkExtent2D image_size;
-    VkDisplayModeKHR display_mode = NULL;
+    VkDisplayModeKHR display_mode = (VkDisplayModeKHR)0;
     VkDisplayModePropertiesKHR display_mode_props = {0};
     VkDisplayModeParametersKHR new_mode_parameters = { {0, 0}, 0};