Fixing empty screen created at the end, even when dragging the last item on the last screen.

Change-Id: If0d4faf0ca15e71facb6ed2fd81ed6a589527836
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 61d09a9..44d70ba 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -2319,14 +2319,14 @@
             throw new IllegalStateException(msg);
         }
 
-        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(),
-                DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale, accessible);
-        dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor());
-
         if (child.getParent() instanceof ShortcutAndWidgetContainer) {
             mDragSourceInternal = (ShortcutAndWidgetContainer) child.getParent();
         }
 
+        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(),
+                DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale, accessible);
+        dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor());
+
         b.recycle();
     }