#83 [Feature request] Render nan-only plots without compilation error

[BambOo]

This feature request is related to a question I asked on stackexchange.
When an axis has \addplots that only contain nan values, or
coordinates that are out of the restrict x domain={} or restrict y domain={} , the compilation fails.
It would have expected that these plots not be drawn, but not a compilation fail.
Basically I would expect that in such cases, the \addplot would fall back to and equivallent of \addlegendimage.