base1: Fix DBusCache.each() to actually work
base1: Fix DBusCache.each() to actually work

The typoed `for` iterator variable shadowed the function argument, and
the local `ifa` variable was never set. As a result, the callback wasn't
ever called.

This might fix some subtle bugs with not picking up some D-Bus proxy
updates.

cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,mvollmer/cockpit,martinpitt/cockpit,mvollmer/cockpit,mvollmer/cockpit,cockpit-project/cockpit