This function was abstracting things a bit too much; the layerStore had a
exported `.Get()` which called `.getWithoutLock()`, but also a non-exported
`.get()`, which also called `.getWithoutLock()`.
While it's common to have a non-exported variant (without locking), the naming
of `.get()` could easily be confused for that variant (which it wasn't).
All locations where `.get()` was called were already handling locks for
`releaseLayer()`, so moving the actual locking inline for `.get()` makes it
more visible where locking happens.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
203fcd6997