Fixed error in VC7 testsuite:

error C2027: use of undefined type 'QMainWindow'
c:\Qt\3.0.4.NET\include\qdockwindow.h(56) : see declaration of 'QMainWindow'

Packages/Qt_widget/demo/Qt_widget/Alpha_shapes_2/Qt_widget_toolbar_layers.h

@@ -33,6 +33,7 @@
 
 //Qt
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
 #include <qstatusbar.h>

Packages/Qt_widget/demo/Qt_widget/Min_quadrilateral_2/Qt_widget_toolbar_layers.h

@@ -29,6 +29,7 @@
 #include "min_quadrilateral_layers.h"
 
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
 #include <qstatusbar.h>

Packages/Qt_widget/demo/Qt_widget/Nef_2/Qt_widget_toolbar_layers.h

@@ -48,6 +48,7 @@
 #include "nef_2_layers.h"
 
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
 #include <qstatusbar.h>

Packages/Qt_widget/demo/Qt_widget/Partition_2/Qt_widget_toolbar.h

@@ -53,9 +53,9 @@
 
 
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
-#include <qmainwindow.h>
 #include <qbuttongroup.h>
 
 

Packages/Qt_widget/demo/Qt_widget/Partition_2/Qt_widget_toolbar_layers.h

@@ -48,11 +48,12 @@
 #include <CGAL/IO/Qt_widget.h>
 
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
 #include <qstatusbar.h>
 #include <qbuttongroup.h>
-#include <qmainwindow.h>
+
 
 namespace CGAL {
 

Packages/Qt_widget/demo/Qt_widget/Triangulation_2/Qt_widget_toolbar_layers.h

@@ -35,6 +35,7 @@
 #include "Qt_layer_show_circum_circle.h"
 
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
 #include <qstatusbar.h>

Packages/Qt_widget/demo/Qt_widget/Triangulation_2_constrained/Qt_widget_toolbar_layers.h

@@ -52,6 +52,7 @@
 
 
 #include <qobject.h>
+#include <qmainwindow.h>
 #include <qtoolbutton.h>
 #include <qtoolbar.h>
 #include <qstatusbar.h>