rb_tree: Fix LTO issue with GCC and NOUBSAN
rb_tree: Fix LTO issue with GCC and NOUBSAN

This is weird. Super weird. Maybe it's time to retire this tree
implementation.

Signed-off-by: Pedro Falcato <d037c3eb54456eb57a351d3e1361e11b3d89c857@gmail.com>

heatd/Onyx,heatd/Onyx,heatd/Onyx,heatd/Onyx