Added options to control the memory allocated for the query queue.

Fixed const-correctness in several methods of the SQLite connection.

modules/sqlite/Connection.cpp

@@ -244,6 +244,15 @@ void Connection::CopyToDatabase(const Connection & db)
     TakeSnapshot(db.m_Handle);
 }
 
+// ------------------------------------------------------------------------------------------------
+void Connection::ReserveQueue(Uint32 num)
+{
+    // Validate the handle
+    Validate();
+    // Perform the requested operation
+    m_Handle->mQueue.reserve(m_Handle->mQueue.size() + num);
+}
+
 // ------------------------------------------------------------------------------------------------
 Int32 Connection::Flush(Uint32 num)
 {