[Distel-hackers] patch for completion

[Dimitris D. <di...@gm...>]

Hello,

I found an otp_doc server crash while trying to complete a function  
in a non otp module.

To reproduce try to complete: distel:ap

Unexpected reply: [rex [badrpc [EXIT [[bad_return_value no_data]  
[gen_server call (otp_doc [funcs "distel" "ap" nil])]]]]]

=ERROR REPORT==== 10-Aug-2008::21:57:38 ===
** Generic server otp_doc terminating
** Last message in was {funcs,"distel","ap",[]}
** When Server state == {state,"/opt/local/lib/erlang",file,"-"}
** Reason for termination ==
** {bad_return_value,no_data}

I found out that e_get({file,M}) thows no_data since M is not an otp  
module and does not exist in the cache.

The attached patch solves this problem and modifies distel:modules  
and distel:functions to use xref if the otp_doc returns an empty list.

Cheers,
Dimitris