https://bugs.gentoo.org/652930

--- a/Source/OpenGL_Windows.cpp
+++ b/Source/OpenGL_Windows.cpp
@@ -839,7 +839,7 @@
     (void) jpeg_read_header(&cinfo, TRUE);
 
     cinfo.out_color_space = JCS_RGB;
-    cinfo.quantize_colors = 0;
+    cinfo.quantize_colors = FALSE;
     (void) jpeg_calc_output_dimensions(&cinfo);
     (void) jpeg_start_decompress(&cinfo);