When a Proton Drive file has no active revision attributes,
readMetaDataForLink returns a nil FileSystemAttrs and Object.originalSize
is left as nil. Object.Open then dereferenced this nil pointer when
calling fs.FixRangeOption, causing a SIGSEGV during copy.
Use Object.Size() instead, which already implements the correct fallback
to the link size when originalSize is unavailable.
This updates the github.com/rclone/Proton-API-Bridge package to fix a
segfault when reading files with no metadata.
Fixes#9377Fixes#9117
Nick Craig-Wood
0737599cd4