tomlogic/xbee_ansic_library — pull request #2 by Zillode (2014-02-01 13:51:12+00:00)
Title: Xbee frame should be dispatched to entries that match all frame types (0) or matches the current frame's type

As mentioned in the documentation: if the frame type equals 0 in the xbee_dispatch_table_entry, match all frames.
This allows users to have a handler that catches all incoming frames.