Chapter 13 Block_redux example missing double buffer pixel attribute.

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What steps will reproduce the problem?
1. Compile and run chapter 13 Block_redux example.
2.
3.

What is the expected output? What do you see instead?
OpenGL window just shows white screen instead of scene.

What version of the product are you using? On what operating system?
Windows 7

Please provide any additional information below.
Setting double buffering is missing when specifying pixel attributes:
WGL_DOUBLE_BUFFER_ARB,  GL_TRUE, // Double buffered context

Original issue reported on code.google.com by [email protected] on 20 Jan 2012 at 2:53