[FIX] registry: restore `elif` changed to `if` in previous commit, for better readability (no effect)
[FIX] registry: restore `elif` changed to `if` in previous commit, for better readability (no effect)

This should have no effect because when the first `if`
is entered a new registry is instantiated with
the default value for base_cache_signaling_sequence
set to 1, preventing entering the next `if` even
without `elif`.

akretion/openerp-server,akretion/openerp-server,akretion/openerp-server