System Information
Windows 8.1 nvidia Gtx 670

Blender Version
Broken: (2.74 RC 2 - 2.74.2 87cff57

Short description of error
SSAO not working when openGL-rendering the viewport through an ortographic camera. (works in viewport)

Exact steps for others to reproduce the error

hit the opengl vieport render button through an othographic camera, and the ambient occlusion will not render.

while normal ortographic vieport (when not looking through camera) or a perpective camera will render as expected.