SDL: Allow creating an empty surface with pitch 0

SDL Commits
1 
From 77bcd269beccdd281789673313c4bb677e70bb12 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Wed, 16 Nov 2022 22:23:16 -0800
Subject: [PATCH] Allow creating an empty surface with pitch 0

This fixes Maelstrom, which creates an empty staging surface and then uses it for transfer to texture
---
 src/video/SDL_surface.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c
index f3ee6a4c4126..5930e40551e0 100644
--- a/src/video/SDL_surface.c
+++ b/src/video/SDL_surface.c
@@ -230,7 +230,7 @@ SDL_CreateRGBSurfaceFrom(void *pixels,
 
     minimalPitch = SDL_CalculatePitch(format, width, SDL_TRUE);
 
-    if (pitch < 0 || ((size_t) pitch) < minimalPitch) {
+    if (pitch < 0 || (pitch > 0 && ((size_t) pitch) < minimalPitch)) {
         SDL_InvalidParamError("pitch");
         return NULL;
     }
@@ -272,7 +272,7 @@ SDL_CreateRGBSurfaceWithFormatFrom(void *pixels,
 
     minimalPitch = SDL_CalculatePitch(format, width, SDL_TRUE);
 
-    if (pitch < 0 || ((size_t) pitch) < minimalPitch) {
+    if (pitch < 0 || (pitch > 0 && ((size_t) pitch) < minimalPitch)) {
         SDL_InvalidParamError("pitch");
         return NULL;
     }