Crash when using Interference2DParaCrystal, integrate over Xi

To reproduce:

Have a GISAS instrument

Use the included standard sample "Interference 2D paracrystal"

Run simulation -> CRASH

The crash happens here:

If "no integration over xi" is selected, the crash disappears.

This happens in V1.18 and also in the current develop version

added crash label

changed title from Crash when using Interference2DParaCrystal, integrat over Xi to Crash when using Interference2DParaCrystal, integrate over Xi

Inevitable effect of #21 (closed). Please disable this computation for WIN32 in the GUI, and hard-code an error message.

mentioned in issue #21 (closed)

assigned to @m.puchner

mentioned in commit 9e3d6bce

mentioned in merge request !529 (merged)

mentioned in commit 3841be0a

closed with merge request !529 (merged)

mentioned in commit 812fbed0

mentioned in merge request !1756 (merged)

mentioned in commit 3b00dc70

mentioned in commit 6d1af04a

mentioned in commit b82ffb55

mentioned in commit 22952a6f