mimetypebrowser example: Fix building of the hierarchy.

Replace QMimeType::inherits() by a check using the list of parents
since only the direct children are needed to build the tree.

Change-Id: I041f21c4b94c8a250f7402a6f550f987c64f8fe8
Reviewed-by: David Faure <david.faure@kdab.com>

examples/corelib/mimetypes/mimetypebrowser/mimetypemodel.cpp

@@ -135,8 +135,8 @@ void MimetypeModel::populate()
         // append the items to parent and truncate the list.
         const QString &parentName = nameIndexIt.key();
         const Iterator start =
-            std::stable_partition(allTypes.begin(), end,
-                                  [parentName](const QMimeType &t) { return !t.inherits(parentName); });
+            std::stable_partition(allTypes.begin(), end, [parentName](const QMimeType &t)
+                                  { return !t.parentMimeTypes().contains(parentName); });
         std::stable_sort(start, end);
         QStandardItem *parentItem = itemFromIndex(nameIndexIt.value());
         for (Iterator it = start; it != end; ++it) {