x11-wm/phoc: unbreak build after b991d37c58ed
ld: error: undefined symbol: round
referenced by layer-shell-effects.c
examples/layer-shell-effects.p/layer-shell-effects.c.o:(drag_surface_handle_dragged)referenced by layer-shell-effects.c
examples/layer-shell-effects.p/layer-shell-effects.c.o:(main)
Reported by: pkg-fallout