Document::getField can not handle unkown field ?

[Zhi-Wei Huang]

Hi,
I use python method
        bib = doc.get_field('bibitem')
to get string from a document entry, but Referencer crashes and shows
the debug info
Document::getField: WARNING: unknown field 'bibitem'

Then I view Document.C and see
Document::getField
get field from bib block, and returns strings for all known fields.
However, for unknown field, there is only a line of DEBUG info, no
string is returned, even an empty string "".

I change the code and compile the project, it works now. So I think
that may be a bug. I'm not sure, :).

The diff info is here:
===============================================
--- a/src/Document.C	Tue Oct 28 17:40:27 2008 +0000
+++ b/src/Document.C	Wed Oct 29 22:21:32 2008 +0800
@@ -714,6 +714,7 @@
 			return bib_.extras_[_field];
 		} else {
 			DEBUG1 ("Document::getField: WARNING: unknown field %1", field);
+			return "";
 		}
 	}
 }
===============================================

Best regards,

Huang