SaveNXSPE validator not working with default on RHEL6

[Andrei Savici]

SaveNXSPE should read incident energy from the workspace when it is available. In MantidPlot on RHEL 6 leaving the default nan or deleting everything from the box results in invalid input. Works fine on Ubuntu 13.10. It seems like a validator problem. To test, create a workspace with DGSReduction, then in MantidPlot try to run the SaveNXSPE algorithm and use the default incident energy entry (nan).

[Russell Taylor]

Re #9087. Use EMPTY_DBL instead of NaN for default property values.

The NaN caused trouble with validation on RHEL6.

Note that psi had a guard to not write out a value if it is 'empty'. This obviously harks back to when the default had been EMPTY_DBL in the past, but in the current implementation it will always write out something, and that something will be NaN for the default. I've preserved that behaviour.

Changeset: 3d32f54bd207913998794addd4fb74c51c5a9591

[Russell Taylor]

Re #9087. Formatting and indentation fixed.

Not functional changes.

Changeset: a7562303a0936e96867ce1fdaef419627e610e21

[Russell Taylor]

This should be tested on RHEL6. The old behaviour would show nan in the Efixed & Psi property boxes and validation (that little red star) would fail if you left it there or tried to leave the box blank. Other platforms were OK with this. Now the box should be empty by default, and the algorithm will run without entering anything in them.

[Michael Reuter]

Merge remote branch 'origin/bugfix/9087_savenxspe_nan_propertydefault'

Full changeset: ​e05fa29642f29aab8005b42321b4b7284d2f7e93

[Stuart Campbell]

This ticket has been transferred to github issue ​9930