interceptor: fix reporting of missing inputs

When missing inputs are reported, the Command's debug representation was
printed before the inputs/outputs where filled. That is not ideal. Fix
that by doing that check after the assignment.

Signed-off-by: Matthias Maennich <maennich@google.com>
Change-Id: I8cabd3243c9decee480daad151d69d4c77852b60
1 file changed