From a6945cb85228820394b5f6ae9c8db224cf5d23f3 Mon Sep 17 00:00:00 2001
From: cshesse <48501609+cshesse@users.noreply.github.com>
Date: Sun, 22 Dec 2019 20:39:23 -0800
Subject: [PATCH] fix possible bug in uniform sample code

---
 stb_voxel_render.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stb_voxel_render.h b/stb_voxel_render.h
index b323b4d..b84bd8f 100644
--- a/stb_voxel_render.h
+++ b/stb_voxel_render.h
@@ -614,7 +614,7 @@ void setup_uniforms(GLuint shader, float camera_pos[4], GLuint tex1, GLuint tex2
       stbvox_uniform_info sui;
       if (stbvox_get_uniform_info(&sui, i)) {
          GLint loc = glGetUniformLocation(shader, sui.name);
-         if (loc != 0) {
+         if (loc != -1) {
             switch (i) {
                case STBVOX_UNIFORM_camera_pos: // only needed for fog
                   glUniform4fv(loc, sui.array_length, camera_pos);