This patch removes the reference to an option for fast coding unit analysis through short circuiting when no residual was encoded. The reason it is being removed is because the x265 developers are no longer supporting this feature. https://bitbucket.org/multicoreware/x265/commits/9ab104096834f51bd799ea1cf1160092f8182944
This option was not being used in avidemux, except for during the debug print of the x265 settings. Note that the x265 developers also forgot to increment the X265_BUILD number, so there are multiple X265_BUILD == 45. Since this flag wasn't actually being used in avidemux, I simply removed the printf for the boolean value. It was a one-line change.
The patch has been attached. Apply the patch with "patch -p1 < bEnableCbfFastModeV45.diff".
Thanks mean, and let me know if you have any questions.