XML reader: report error when requested number of elements is invalid for allocated array
Add check that requested number of array values is valid
Do some bounds checking on the requested number of array elements to read and return an error indicator if it is not.
Warn if no Points element is found in first piece of a VTU file. Since the Points element in the first piece is used to initialize the points, report when it doesn't exist.
Edited by Cory Quammen