This makes us more consistent with the rest of the codebase, using xalloc/xfree
Signed-off-by: Jeremy Huddleston <jeremyhu@freedesktop.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
Leaving xpr unflattened since we want modularity to replace that with xpc (XPluginComposite) at some point
(cherry picked from commit 48e6a75fbdd0fee86e364f02ace83f20b312a2b2)