SDL: Clarify SDL_GPUVertexBufferDescription.pitch comment (#13381)

SDL Commits
1 
From ee6d8f78f469c6acf1271518d4d8ab79d5119a13 Mon Sep 17 00:00:00 2001
From: BurntRanch <[EMAIL REDACTED]>
Date: Thu, 17 Jul 2025 18:53:35 +0300
Subject: [PATCH] Clarify SDL_GPUVertexBufferDescription.pitch comment (#13381)

---
 include/SDL3/SDL_gpu.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/SDL3/SDL_gpu.h b/include/SDL3/SDL_gpu.h
index b61b4d3b64616..0e82e2b0400cc 100644
--- a/include/SDL3/SDL_gpu.h
+++ b/include/SDL3/SDL_gpu.h
@@ -1627,7 +1627,7 @@ typedef struct SDL_GPUSamplerCreateInfo
 typedef struct SDL_GPUVertexBufferDescription
 {
     Uint32 slot;                        /**< The binding slot of the vertex buffer. */
-    Uint32 pitch;                       /**< The byte pitch between consecutive elements of the vertex buffer. */
+    Uint32 pitch;                       /**< The size of a single element + the offset between elements. */
     SDL_GPUVertexInputRate input_rate;  /**< Whether attribute addressing is a function of the vertex index or instance index. */
     Uint32 instance_step_rate;          /**< Reserved for future use. Must be set to 0. */
 } SDL_GPUVertexBufferDescription;