In TGraph2DPainter::PaintLevels the colour levels used to paint the triangles did not match the minimum and maximum set by the user on the TGraph2D.
Fixed CID 52067 and retval of PollForNewWorkers()
Harmonized a couple of R_ASSERTs
Merge pull request #3 from dberzano/v5-34-00-proof-dynamic-workers

Coverity fix and better consistency checks