From 89f3f35c9fb82f215e2f765ab4aeb05c245fcb8e Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Tue, 28 Apr 2020 11:56:30 -0400
Subject: [PATCH] stbi__skip should return immediately if skipping zero bytes.

Otherwise we might waste time or throw away state in the i/o callbacks.
---
 stb_image.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stb_image.h b/stb_image.h
index 153ada2..8286b22 100644
--- a/stb_image.h
+++ b/stb_image.h
@@ -1564,6 +1564,7 @@ stbi_inline static int stbi__at_eof(stbi__context *s)
 #else
 static void stbi__skip(stbi__context *s, int n)
 {
+   if (n == 0) return;  // already there!
    if (n < 0) {
       s->img_buffer = s->img_buffer_end;
       return;