[tracker] libtracker-data: Bugfix in the LRU cache

[Philip Van Hoof <pvanhoof src gnome org>]

commit e75105ec5ffb39ab23cb0aa8588bb1f634668c88
Author: Philip Van Hoof <philip codeminded be>
Date:   Thu Sep 23 12:19:31 2010 +0200

    libtracker-data: Bugfix in the LRU cache

 src/libtracker-data/tracker-db-interface-sqlite.c |   32 +++++++++++----------
 1 files changed, 17 insertions(+), 15 deletions(-)
---
diff --git a/src/libtracker-data/tracker-db-interface-sqlite.c b/src/libtracker-data/tracker-db-interface-sqlite.c
index 4b7b293..7529281 100644
--- a/src/libtracker-data/tracker-db-interface-sqlite.c
+++ b/src/libtracker-data/tracker-db-interface-sqlite.c
@@ -950,21 +950,23 @@ tracker_db_interface_create_statement (TrackerDBInterface           *db_interfac
 	} else {
 		tracker_db_statement_sqlite_reset (stmt);
 
-		if (stmt == stmt_lru->head) {
-			/* Current stmt is least used, shift the ring */
-			stmt_lru->head = stmt_lru->head->next;
-			stmt_lru->tail = stmt_lru->tail->next;
-		} else if (stmt != stmt_lru->tail) {
-			/* Take stmt out of the list */
-			stmt->prev->next = stmt->next;
-			stmt->next->prev = stmt->prev;
-			/* Put stmt as tail (most recent used) */
-			stmt->next = stmt_lru->head;
-			stmt_lru->head->prev = stmt;
-			stmt->prev = stmt_lru->tail;
-			stmt_lru->tail->next = stmt;
-			stmt_lru->tail = stmt;
-		} /* if (stmt == tail), do nothing, of course */
+		if (cache_type != TRACKER_DB_STATEMENT_CACHE_TYPE_NONE) {
+			if (stmt == stmt_lru->head) {
+				/* Current stmt is least used, shift the ring */
+				stmt_lru->head = stmt_lru->head->next;
+				stmt_lru->tail = stmt_lru->tail->next;
+			} else if (stmt != stmt_lru->tail) {
+				/* Take stmt out of the list */
+				stmt->prev->next = stmt->next;
+				stmt->next->prev = stmt->prev;
+				/* Put stmt as tail (most recent used) */
+				stmt->next = stmt_lru->head;
+				stmt_lru->head->prev = stmt;
+				stmt->prev = stmt_lru->tail;
+				stmt_lru->tail->next = stmt;
+				stmt_lru->tail = stmt;
+			} /* if (stmt == tail), do nothing, of course */
+		}
 	}
 
 	g_free (full_query);