[rygel] db: Don't set synchronous pragma on R/O dbs

[Jens Georg <jensgeorg src gnome org>]

commit 66bbc9fd8f7d0ad1639ff8bd26174f9cd2c1281c
Author: Jens Georg <mail jensge org>
Date:   Tue Mar 1 22:04:01 2016 +0100

    db: Don't set synchronous pragma on R/O dbs
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/librygel-db/database.vala |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/librygel-db/database.vala b/src/librygel-db/database.vala
index af1f24d..77b0576 100644
--- a/src/librygel-db/database.vala
+++ b/src/librygel-db/database.vala
@@ -178,7 +178,9 @@ public class Rygel.Database.Database : Object, Initable {
 
         debug ("Using database file %s", path);
 
-        this.exec ("PRAGMA synchronous = OFF");
+        if (flags != Flags.READ_ONLY) {
+            this.exec ("PRAGMA synchronous = OFF");
+        }
 
         if (Flags.SHARED in flags) {
             this.exec ("PRAGMA journal_mode = WAL");