ID 413707 - Add controls for handling "Matte has no fully white pixels to sample from" message in the EdgeExtend node

Problem summary
EdgeExtend node has no way to handle no white pixels in the Matte

Customer reported version
nuke.12.2v3

Customer reported platform

Steps to reproduce

1) Open Nuke

2) Open the attached Nuke script, EdgeExtendNoWhitePixels.nk

3) Scrub through the frame range, notice the error appears when there are no fully white values, and there is no way to handle errors.

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Expected behaviour
The EdgeExtend node to render an image without fully white pixels, or render black if not possible.

Actual behaviour
The node errors, which causes render to break.

Workaround
Unknown.

Reproduced by support
This bug has been reproduced in:
Nuke 13.0v2 - Windows 10, CentOS 7.5, macOS 10.15
Nuke 12.0v1 - Windows 10, CentOS 7.5, macOS 10.15


Earliest version tested
Nuke 12.0v1 - This feature did not exist before this version