"ref/profiles/iternal/ipc": Support LocalDischarges

This CL accompanies: https://vanadium-review.googlesource.com/#/c/6765/

MultiPart: 2/2
Change-Id: Ia41e9c9c5fea07d16d2b56950e8d2ee0740b080d
diff --git a/services/wsprd/app/app.go b/services/wsprd/app/app.go
index cdbfded..ad05bb6 100644
--- a/services/wsprd/app/app.go
+++ b/services/wsprd/app/app.go
@@ -391,6 +391,7 @@
 func (l *localCall) MethodTags() []*vdl.Value                        { return l.tags }
 func (l *localCall) Name() string                                    { return l.vrpc.Name }
 func (l *localCall) Suffix() string                                  { return "" }
+func (l *localCall) LocalDischarges() map[string]security.Discharge  { return nil }
 func (l *localCall) RemoteDischarges() map[string]security.Discharge { return nil }
 func (l *localCall) LocalPrincipal() security.Principal              { return nil }
 func (l *localCall) LocalBlessings() security.Blessings              { return security.Blessings{} }