Support G_SIGNAL_MATCH_ID in g_signal_handlers_block/unblock/disconnect_matched()
requested to merge pgorszkowski-igalia/glib:pgorszkowski/add_signal_id_option_to_g_signal_handlers_block_matched into main
Calling g_signal_handlers_block/unblock/disconnect_matched with only G_SIGNAL_MATCH_ID do not match any handlers and return 0.
Closes #2980 (closed)
Fixes #2980 (closed)
Edited by Philip Withnall