File

util.datamapper: Fix error on attempt to coerce nil to something Turns falsy values into nil instead of nothing, which ensures this function always has 1 return value, or table.insert({}) complains. Would still happen on some unexpected input, but that's actually a good thing.

# Basic login and initial presence

[Client] Romeo
	jid: user@localhost
	password: password

---------

Romeo connects

Romeo sends:
	<presence/>

Romeo receives:
	<presence/>

Romeo disconnects