Frees a block of memory.
The memory must have been allocated via
g_slice_alloc0() and the
block_size has to match the size
specified upon allocation. Note that the exact release behaviour
can be changed with the [
G_DEBUG=gc-friendly][G_DEBUG] environment variable.
NULL, this function does nothing.
Since GLib 2.76 this always uses the system
free_sized() implementation internally.
Available since: 2.10