sharedconfig: actually return from load()

because who needs return values for a function dedicated specifically to
returning a value, amirite?

sharedconfig.lua

@@ -51,6 +51,8 @@ function sharedconfig.load(key)
 	end
 	-- defaults haven't been initialized yet
 	if defaults_table == nil then return nil end
+
+	return sharedstate.get(key)
 end
 
 --- Save config