Crash test update: VectorGraphicData::ensureSequenceAndRange

[Caolán McNamara]

On Sat, 2021-02-13 at 09:19 +0000, crashtest wrote:
> New crashtest update

one of these crashes has relatively recently appeared and is
reproducible for me:
https://dev-builds.libreoffice.org/crashtest/beeed387732f95501b06b5462d450517422b18ba/backtraces/task1183-core.backtrace.txt

$ wget https://bugs.documentfoundation.org/attachment.cgi?id=145182 -O 
tdf118346-1.odg
$ ./instdir/program/soffice.bin --headless --convert-to odg:output.odg
./tdf118346-1.odg

crashes in VectorGraphicData::ensureSequenceAndRange in some odd way
during assigning to maSequence