From 51909e0cb44ee8de346f3edfb2a6c4a8bb97ea1d Mon Sep 17 00:00:00 2001
From: Brandon Wright <bearoso@gmail.com>
Date: Fri, 4 Jan 2019 10:52:11 -0600
Subject: [PATCH] Fix PNG usage without preprocessor check.

---
 shaders/shader_helpers.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/shaders/shader_helpers.cpp b/shaders/shader_helpers.cpp
index b84e6291..a589d39b 100644
--- a/shaders/shader_helpers.cpp
+++ b/shaders/shader_helpers.cpp
@@ -93,6 +93,7 @@ bool loadPngImage(const char* name,
     bool& outHasAlpha,
     GLubyte** outData)
 {
+#ifdef HAVE_LIBPNG
     png_structp png_ptr;
     png_infop info_ptr;
     unsigned int sig_read = 0;
@@ -211,6 +212,9 @@ bool loadPngImage(const char* name,
 
     /* That's it */
     return true;
+#else
+    return false;
+#endif
 }
 
 bool loadTGA(const char* filename, STGA& tgaFile)