segmentation errors in svpost

[wgyang]

Users have reported that sometimes segmentation errors occur when svpost reduces field data (e.g. wall shear stress) from restart files for multiple processors. It seems it is caused by a corrupted header in a restart file. One may need to recalculate wall shear stress from solutions (velocity). I think we need to set "RequestedvInPlaneTraction=true; RequestedvWSS = true; RequestedSolution = true" to output solutions and recalauted WSS/tractions only when other field data cause segmentation errors in svpost.

[ktbolt]

The latest version of svpost does not fail. Processing results with a corrupted restart file produces

Reducing (vwall shear stresses) results : post-processing-errors/restart.1000.20
Reducing (vwall shear stresses) results : post-processing-errors/restart.1000.21
Reducing (vwall shear stresses) results : post-processing-errors/restart.1000.22
ERROR parsing header: Unexpected end of line.
Reducing (vwall shear stresses) results : post-processing-errors/restart.1000.23
Reducing (vwall shear stresses) results : post-processing-errors/restart.1000.24

However, the results will be zero for the nodes in restart.1000.22.