Warn if we fail to find the method in introspection.
Warn if we fail to find the method in introspection.

We were failing silently. This made troubleshooting harder.

gregier/libpeas,chergert/libpeas,GNOME/libpeas,Distrotech/libpeas,gregier/libpeas,Distrotech/libpeas,Distrotech/libpeas,chergert/libpeas,gregier/libpeas,chergert/libpeas,gregier/libpeas,GNOME/libpeas