Model reset fixup to use begin/endResetModel

Which is how you are supposed to reset a model and works
on QT 4 as well as QT 5.

src/GcCalendarModel.h

@@ -88,6 +88,9 @@ public slots:
 
         if (!sourceModel()) return; // no model yet!
 
+        // ok, let em know we're about to reset!
+        beginResetModel();
+
         QDate first = QDate(year, month, 1);
         // Date array
         int monthDays = first.daysTo(first.addMonths(1)); // how many days in this month?
@@ -135,12 +138,9 @@ public slots:
             arr->append(j);
             dateToRows.insert(dateTime.date(), arr);
         }
-#if QT_VERSION > 0x050000
-        resetInternalData(); //XXX BROKEN!
-#else
-        reset();
-#endif
 
+        // reset completed
+	endResetModel();
     }
 
 public:

src/RideNavigatorProxy.h

@@ -488,13 +488,14 @@ public:
 
 public slots:
     void sourceModelChanged() {
+
+        // notify everyone we're changing
+        beginResetModel();
+
         clearGroups();
         setGroupBy(groupBy+2); // accomodate virtual columns
-#if QT_VERSION > 0x050000
-        resetInternalData(); //XXX BROKEN!
-#else
-        reset();
-#endif
+
+        endResetModel();// we're clean
 
         // lets expand column 0 for the groupBy heading
         for (int i=0; i < groupCount(); i++)