[tracker/tracker-0.6] Fixes NB#119840, Music-Artists -Library view not displayed by tapping on

[Mikael Ottela <mottela src gnome org>]

commit e201076bc04619d05b000b1317b92f39d27d7781
Author: Mikael Ottela <mikael ottela ixonos com>
Date:   Thu Jun 4 19:55:25 2009 +0300

    Fixes NB#119840, Music-Artists -Library view not displayed by tapping on
    (unknown Artist)
    
    Update the check for empty string value for NULL include.
---
 src/libtracker-data/tracker-rdf-query.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/libtracker-data/tracker-rdf-query.c b/src/libtracker-data/tracker-rdf-query.c
index 311e750..db61534 100644
--- a/src/libtracker-data/tracker-rdf-query.c
+++ b/src/libtracker-data/tracker-rdf-query.c
@@ -813,7 +813,9 @@ build_sql (ParserData *data)
 						where_field,
 						data->current_value);
 		} else {
-			if ( !strlen(value) || (strcmp(value, " '' ") == 0) ) {
+			/* FIXME This check is too fragile */
+			g_debug ("value:(%s)", value);
+			if ( !strlen(value) || (strcmp(value, "''") == 0) ) {
 				tracker_field_data_set_needs_null (field_data, TRUE);
 				g_string_append_printf (str, " ((%s = '') OR %s IS NULL) ",
 							where_field,