Handle large chests correctly for hopper events. Fixes BUKKIT-3979

In commit 7710efc5f9 we corrected the handling of large chests as the
destination for hoppers moving items but did not apply the same fix for
large chests being the source or for droppers. This commit updates these
to have the same fix.
Merge branch 'master' of https://github.com/Bukkit/CraftBukkit