Avoid useless notes writing
Avoid useless notes writing

When a note is synced, the stack checks if it has a change since the
last write in the VFS (and updates the file if it is the case). This
check was failing because of a comparison between a float64 and an
int64, and this commit fixes this issue.

nono/cozy-stack,nono/cozy-stack,nono/cozy-stack,nono/cozy-stack,nono/cozy-stack