font/sfnt: fix argStack size check for moveto ops.

The *moveto ops don't take multiple args or arg pairs. For example, in
page 16, the rmoveto args are listed as:
dx1 dy1
which is not the same as rlineto's args, which can be repeated:
{dxa dya}+

Change-Id: I5d13f686e604955909eb0b7e52f20ce5f0522c5d
Reviewed-by: David Crawshaw <>
1 file changed