Fix for using protocol buffers against sqlite.
Fix for using protocol buffers against sqlite.

The sqlite return values are unicode.  This presents problems when
adding that data into protocol buffer messages where the fields
are marked as strings.

This commit fixes recent changes to conform with surrounding code
that surrounds any strings being added to the protocol buffers
with a call to str().

guillaume-philippon/aquilon,stdweird/aquilon,stdweird/aquilon,guillaume-philippon/aquilon,quattor/aquilon,guillaume-philippon/aquilon,quattor/aquilon,quattor/aquilon,stdweird/aquilon