Cleanup: Fix order of initialization in MainTab::MainTab()

For deterministic construction/destruction (i.e. objects are
destructed in reverse order of construction) it is crucial that
constructor initializer lists follow the order of the class
definition.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

desktop-widgets/tab-widgets/maintab.cpp

@@ -50,11 +50,11 @@ struct Completers {
 
 MainTab::MainTab(QWidget *parent) : QTabWidget(parent),
 	editMode(NONE),
+	modified(false),
 	lastSelectedDive(true),
 	lastTabSelectedDive(0),
 	lastTabSelectedDiveTrip(0),
-	currentTrip(0),
-	modified(false)
+	currentTrip(0)
 {
 	ui.setupUi(this);