update bundled_deps

bundled_deps/libigl/igl/opengl2/glext.h

@@ -0,0 +1,32 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2017 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#ifndef IGL_OPENGL_GLEXT_H
+#define IGL_OPENGL_GLEXT_H
+
+#ifdef IGL_OPENGL2_GLEXT_H
+#  error "igl/opengl2/glext.h already included"
+#endif
+
+// Always use this:
+//     #include "gl.h"
+// Instead of:
+//     #include <OpenGL/glext.h>
+// or 
+//     #include <GL/glext.h>
+//
+
+#ifdef __APPLE__
+#  include <OpenGL/glext.h>
+#elif _WIN32
+// do nothing(?)
+#else 
+#  include <GL/glext.h>
+#endif
+
+#endif
+