[shotwell] db: Add compile option to trace SQL statements

[Jens Georg <jensgeorg src gnome org>]

commit 3ddd7ec0daee52345beb091dd70f30fffef0f512
Author: Jens Georg <mail jensge org>
Date:   Sun Jun 26 10:47:36 2016 +0200

    db: Add compile option to trace SQL statements
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/db/DatabaseTable.vala |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/db/DatabaseTable.vala b/src/db/DatabaseTable.vala
index 42eac69..09c026f 100644
--- a/src/db/DatabaseTable.vala
+++ b/src/db/DatabaseTable.vala
@@ -49,6 +49,13 @@ public abstract class DatabaseTable {
                     e.message));
             }
         }
+#if SQLITE_DEBUG
+        db.trace (on_trace);
+#endif
+    }
+
+    public static void on_trace (string message) {
+        debug ("SQLITE: %s", message);
     }
 
     public static void init(string filename) {