[gtk] testsuite/gtk/filterlistmodel.c: Avoid GCCism

[Chun-wei Fan <fanchunwei src gnome org>]

commit cebf5ed46cc326fd4eacfc434e83d1b581cff1f9
Author: Chun-wei Fan <fanc999 yahoo com tw>
Date:   Tue Oct 9 16:24:15 2018 +0800

    testsuite/gtk/filterlistmodel.c: Avoid GCCism
    
    Pointer arithmetic on gpointers (void *) is a GCCism, so avoid that by
    being more explicit with things.

 testsuite/gtk/filterlistmodel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/testsuite/gtk/filterlistmodel.c b/testsuite/gtk/filterlistmodel.c
index 1e259789dc..07fdf77b6f 100644
--- a/testsuite/gtk/filterlistmodel.c
+++ b/testsuite/gtk/filterlistmodel.c
@@ -180,14 +180,14 @@ static gboolean
 is_near (gpointer item,
          gpointer data)
 {
-  return ABS (g_object_get_qdata (item, number_quark) - data) <= 2;
+  return ABS (GPOINTER_TO_INT (g_object_get_qdata (item, number_quark)) - GPOINTER_TO_INT (data)) <= 2;
 }
 
 static gboolean
 is_not_near (gpointer item,
              gpointer data)
 {
-  return ABS (g_object_get_qdata (item, number_quark) - data) > 2;
+  return ABS (GPOINTER_TO_INT (g_object_get_qdata (item, number_quark)) - GPOINTER_TO_INT (data)) > 2;
 }
 
 static void