don't try interface/structure conversion until last resort, because it assumes every call is a real use of the conversion.
don't try interface/structure conversion until
last resort, because it assumes every call is a
real use of the conversion.

R=ken
OCL=19026
CL=19026
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go