Revit19 analytical walls with openings issue

[kpne]

SpeckleStructural/SpeckleStructuralRevit/ConversionRoutines/AnalyticalSurface.cs

Line 38 in e2a29c2

var voidLoops = mySurface.GetLoops(AnalyticalLoopType.Void);

Issue when sending analytical model elements from Revit 19:
When analytical walls (possibly any AnalyticalModelSurface) have openings (AnalyticalLoopType.Void) that coincide with the host surface edge (AnalyticalLoopType.External) both opening and wall has errors that make them not come through to speckle viewer nor into GSA.

Previously flagged here: https://discourse.speckle.works/t/revit19-analytical-walls-with-openings-issue/553/6