gnats/26: index gets messed up if responsible is empty in categories

[sohail@techlogix.com]

>Number:         26
>Category:       gnats
>Synopsis:       index gets messed up if responsible is empty in categories
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 13 03:44:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Sohail Aslam
>Release:        3.113
>Organization:
>Environment:
Redhat linux 6.0, gnats 3.113, gnatsweb 2.5
>Description:
If the reponsible field is left empty, e.g.,
test:*Test Category::
                    ^empty here
The >Responsible: field in the PR is left empty after the :.
This causes the index to get a duplicate entry. Here is how the execution
in the gnats code proceeds. In file gen-index.c, the routine do_category calls read_pr to
pick up the PR from the PR file. gen-index then calls create_index_entry(line). The
character string "line" is passed in which the index entry of the currently read
PR is to be returned. Before proceeding, create_index_entry (in file index.c) checks
whether the PR has responsible field value. If not, create_index_entry returns immediately.
The effect is that the string "line" in do_category retains the index line
from the last good PR. The index file ends with a duplicate entry.
create_index_entry also returns if ARRIVAL_DATE, LAST_MODIFIED and CLOSED_DATE
are found to be empty in the PR. 
>How-To-Repeat:
1. Set responsible to null (::) for a category. Post a PR.
Look at the >Reponsible field in the PR once queue-pr has run.
Run gen-index; a duplicate entry will appear.
>Fix:
gen-index and friends should  should take a more appropriate action than to
simply return when RESPONSIBLE, CLOSED_DATE, ARRIVAL_DATE and LAST_MODIFIED fields
are found to be empty in a PR.
>Release-Note:
>Audit-Trail:
>Unformatted: