[shotwell] Remove uniqueness of PhotoTableMD5Format index

[Jens Georg <jensgeorg src gnome org>]

commit 55a29cabf8e46a0db6a66672a062e666d981a9be
Author: Jens Georg <mail jensge org>
Date:   Wed Nov 9 21:48:26 2016 +0100

    Remove uniqueness of PhotoTableMD5Format index
    
    Signed-off-by: Jens Georg <mail jensge org>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772223

 src/db/PhotoTable.vala |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/src/db/PhotoTable.vala b/src/db/PhotoTable.vala
index f774df5..4ea2790 100644
--- a/src/db/PhotoTable.vala
+++ b/src/db/PhotoTable.vala
@@ -162,7 +162,14 @@ public class PhotoTable : DatabaseTable {
         // https://bugzilla.gnome.org/show_bug.cgi?id=742670
         //
         // 1) index on md5,file_format
-        res = db.prepare_v2 ("CREATE UNIQUE INDEX IF NOT EXISTS PhotoTableMD5Format on PhotoTable(md5, 
file_format)", -1, out stmt);
+        res = db.prepare_v2 ("DROP INDEX IF EXISTS PhotoTableMD5Format", -1, out stmt);
+        assert (res == Sqlite.OK);
+        res = stmt.step ();
+        if (res != Sqlite.DONE) {
+            DatabaseTable.warning ("Failed to drop old PhotoTable index", res);
+        }
+
+        res = db.prepare_v2 ("CREATE INDEX IF NOT EXISTS PhotoTableMD5Format on PhotoTable(md5, 
file_format)", -1, out stmt);
         assert (res == Sqlite.OK);
         res = stmt.step ();
         if (res != Sqlite.DONE) {