[gimp] tools: in performance-log-viewer.py, handle markers with > INT_MAX timestamps

[Ell <ell src gnome org>]

commit 84ff130e1815cf6ba0617bf56c0aa9b6ee8539e2
Author: Ell <ell_se yahoo com>
Date:   Fri Mar 6 12:34:35 2020 +0200

    tools: in performance-log-viewer.py, handle markers with > INT_MAX timestamps

 tools/performance-log-viewer.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tools/performance-log-viewer.py b/tools/performance-log-viewer.py
index 8f96c1c111..8e87eb8027 100755
--- a/tools/performance-log-viewer.py
+++ b/tools/performance-log-viewer.py
@@ -1687,7 +1687,7 @@ class MarkersViewer (Gtk.ScrolledWindow):
         DESC = 2
 
         def __init__ (self):
-            Gtk.ListStore.__init__ (self, int, int, str)
+            Gtk.ListStore.__init__ (self, int, GObject.TYPE_INT64, str)
 
             for marker in markers:
                 self.append ((marker.id, marker.t, marker.description))