gc: Fix memory_block::is_enough_space()
gc: Fix memory_block::is_enough_space()

Fix off-by-one error in memory_block::is_enough_space().

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@kernel.org>

penberg/hornet,penberg/hornet,penberg/hornet,penberg/hornet