Add id_file_key index to database

src/database.cpp

@@ -61,8 +61,15 @@ bool Database::init(const QLatin1String &connectionName)
                 query.exec("CREATE INDEX IF NOT EXISTS maxRa_idx ON fits_files(maxRa)");
                 query.exec("CREATE INDEX IF NOT EXISTS minDec_idx ON fits_files(minDec)");
                 query.exec("CREATE INDEX IF NOT EXISTS maxDec_idx ON fits_files(maxDec)");
+                version = 1;
             }
-            else if(version > 1)
+            if(version == 1)
+            {
+                query.exec("CREATE INDEX IF NOT EXISTS id_file_key ON fits_headers(id_file, key)");
+                query.exec("PRAGMA user_version = 2");
+                version = 2;
+            }
+            if(version > 2)
             {
                 qDebug() << "Database version is too new";
                 return false;