qobject_to() drops const-ness by accident, but our function
arguments (x, y) are const.  Make num_x/num_y const too.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
This is a new patch added in v3 of the series.
---
 qobject/qnum.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/qobject/qnum.c b/qobject/qnum.c
index d328d91fcb..e5ea728638 100644
--- a/qobject/qnum.c
+++ b/qobject/qnum.c
@@ -209,8 +209,8 @@ char *qnum_to_string(QNum *qn)
  */
 bool qnum_is_equal(const QObject *x, const QObject *y)
 {
-    QNum *num_x = qobject_to(QNum, x);
-    QNum *num_y = qobject_to(QNum, y);
+    const QNum *num_x = qobject_to(QNum, x);
+    const QNum *num_y = qobject_to(QNum, y);
 
     switch (num_x->kind) {
     case QNUM_I64:
-- 
2.28.0