Fix warnings about struct/class mismatch in CVS.

Change-Id: Idabfc88b12ee24cf456b78a098206ee143c1341a
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/cvs/settingspage.h

@@ -45,7 +45,7 @@ QT_END_NAMESPACE
 namespace Cvs {
 namespace Internal {
 
-struct CvsSettings;
+class CvsSettings;
 
 class SettingsPageWidget : public QWidget
 {