fix: osd resolution initializing incorrectly (#383)

* fix: only update resolution when it's > 0

* fix: only render after the resolution has been initialized

* chore: update type annotation to fix warning

scripts/uosc_shared/lib/utils.lua

@@ -502,6 +502,7 @@ end
 --[[ RENDERING ]]
 
 function render()
+	if not display.initialized then return end
 	state.render_last_time = mp.get_time()
 
 	-- Actual rendering