From 72660a51dd685d64c9227e9ae10e854ba58b6e17 Mon Sep 17 00:00:00 2001
From: Sylvain Becker <sylvain.becker@gmail.com>
Date: Sun, 13 Oct 2019 20:52:52 +0200
Subject: [PATCH] Fixed bug 4825 - SDL Renderer OpenGL: Buffer overflow
 (SDL_RENDERCMD_DRAW_LINES)

---
 src/render/opengl/SDL_render_gl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index d3ad24f05..06f69b444 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/src/render/opengl/SDL_render_gl.c
@@ -1210,6 +1210,7 @@ GL_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
                         data->glVertex2f(verts[0], verts[1]);
                     }
                     data->glEnd();
+                    verts -= 2 * count;
 
                     /* The line is half open, so we need one more point to complete it.
                      * http://www.opengl.org/documentation/specs/version1.1/glspec1.1/node47.html