libass uses integers for PlayResX/Y, so the osd-overlay command also
does. Lua (pre-5.3) does not have an integer type, but the command
interface makes a difference anyway. If you pass a Lua number with a
fractional part to an integer parameter (using mp.command_native()), it
will result in an error and complain about incompatible types.
I think that's fine, but since this behavior extends to
mp.set_osd_ass(), this is a compatibility problem.
Fix this by explicitly coercing the resolution parameters to integer
numbers.
wm4
d951a7f021