|index||The index of the path to clear.|
With this function you can remove all point definitions from a
path, effectively making an "empty" path. This does not
delete the path, for that you should use path_delete.
if path_get_number(mypath) > 0
The above code checks to see if there are any points on the path indexed in the variable "mypath" and if there are, it clears the path.