* Recompute well cell arrays when the grids change
computeWellCellsPrGrid() returned early whenever the arrays had been computed once, so the
size check below it was unreachable and a stale array was kept when the grids changed. The
too-short array triggered an assert in RivReservoirViewPartMgr::computeNativeVisibility.
Return early only when the cached arrays still match the current set of grids.
* Guard against missing GUI application when applying style sheet
RiaGuiApplication::instance() does a dynamic_cast and returns null outside a GUI context. The
assert guarding this is compiled out in release, so the null pointer was dereferenced.
* Guard against missing case in flow characteristics plot field change
The case field can be set to nothing from the UI. RimEclipseResultCase::defaultFlowDiagSolution()
and reservoirViews() were then called on a null pointer.
* Guard against missing case and out of range time steps when updating flow characteristics plot
onLoadDataAndUpdate() dereferenced the case without checking, although the same function handles
a missing case further down. The time step indices come from the flow diagnostics solution, and
were used to index arrays sized by the number of case time steps without a range check.
Magne Sjaastad
Gaute Lindkvist