throw if length of keys and values are different
See https://crashreport.libreoffice.org/stats/signature/%60anonymous%20namespace'::WriteAnimateValues
This is expected to start rejecting broken files, instead of accepting invalid data silently,
as it did before. This is not a regression, and should be indication of corrupted generator,
which is the actual cause of the bug...
Change-Id: I66dbb380e8b2d313e58cddf938d952aed4a635b7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99327
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>