Core/DBLayer:

- A few prepared statement implementations in authsocket as example.
- Add an ASSERT in MySQLConnection::Execute(PreparedStatement*) to catch faulty created statements

--HG--
branch : trunk

src/server/shared/Database/MySQLConnection.cpp

@@ -191,6 +191,7 @@ bool MySQLConnection::Execute(PreparedStatement* stmt)
 
     uint32 index = stmt->m_index;
     MySQLPreparedStatement* m_mStmt = GetPreparedStatement(index);
+    ASSERT(m_mStmt);            // Can only be null if preparation failed, server side error or bad query
     m_mStmt->m_stmt = stmt;     // Cross reference them for debug output
     stmt->m_stmt = m_mStmt;