reflect: correctly handle direct interface typed receiver in Value.call

A direct interface type's value method takes value receiver now.
Don't pass pointer to the method function.

Change-Id: Ibff5fadbe1cdf9c539dc475edbf728e1dc98e30f
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/175798
Reviewed-by: Ian Lance Taylor <iant@golang.org>
1 file changed