runtime: update type descriptor name in fieldtrack C support code
We were using the old name, but nothing noticed because it is a weak
reference that is permitted to be nil, so that it works with code that
does not use the field tracking library.
Trust: Ian Lance Taylor <email@example.com>
Reviewed-by: Cherry Zhang <firstname.lastname@example.org>
Reviewed-by: Than McIntosh <email@example.com>
1 file changed