Fix QxtFifo and move qxtweb modules in their respective folder

thirdparty/qxt/qxtweb-standalone/core/qxtnull.h

@@ -0,0 +1,68 @@
+
+/****************************************************************************
+** Copyright (c) 2006 - 2011, the LibQxt project.
+** See the Qxt AUTHORS file for a list of authors and copyright holders.
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of the LibQxt project nor the
+**       names of its contributors may be used to endorse or promote products
+**       derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+** DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+** <http://libqxt.org>  <foundation@libqxt.org>
+*****************************************************************************/
+
+#ifndef QXTNULL_H
+#define QXTNULL_H
+
+#include <qxtglobal.h>
+
+/*!
+\class QxtNull QxtNull
+
+\inmodule QxtCore
+
+\brief An object representing the "null" value for QxtNullable.
+
+\sa QxtNullable
+*/
+
+struct QXT_CORE_EXPORT QxtNull
+{
+    /*! integer cast operator
+     * In expressions, QxtNull behaves as an integer zero for compatibility with generic functions.
+     */
+    operator int() const
+    {
+        return 0;
+    }
+    enum { isNull = true };
+};
+
+#ifndef QXT_NO_MACROS
+
+/*! \relates QxtNull
+ * A convenience alias for QxtNull().
+ */
+#define QXT_NULL QxtNull()
+
+#endif // QXT_NO_MACROS
+
+#endif // QXTNULL_H