…tartup when using db_mode 3

- The dialogs that loaded at startup are not saved in DB on shutdown, and so not loaded at restart, fixes issue #3669

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https://github.com/kamailio/kamailio/pull/3688

-- Commit Summary --

* dialog: fixed saving dialogs on shutdown that are already loaded at startup when using db_mode 3

-- File Changes --

M src/modules/dialog/dlg_db_handler.c (3)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3688.patch https://github.com/kamailio/kamailio/pull/3688.diff