Added missing include file.

src/plugins/qmldesigner/core/include/basetexteditmodifier.h

+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+
+#ifndef BASETEXTEDITMODIFIER_H
+#define BASETEXTEDITMODIFIER_H
+
+#include "corelib_global.h"
+#include "plaintexteditmodifier.h"
+
+namespace QmlDesigner {
+
+class CORESHARED_EXPORT BaseTextEditModifier: public PlainTextEditModifier
+{
+public:
+    BaseTextEditModifier(QPlainTextEdit *textEdit);
+
+    virtual void indent(int offset, int length);
+};
+
+} // namespace QmlDesigner
+
+#endif // BASETEXTEDITMODIFIER_H