[gnome-calendar] calendar: Use gulong for signal handlers

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit bb2a1321be880354201b964443203ac25c9e6704
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Jul 13 19:52:53 2019 -0300

    calendar: Use gulong for signal handlers
    
    They are unsigned longs, not unsigned ints.

 src/core/gcal-calendar.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/core/gcal-calendar.c b/src/core/gcal-calendar.c
index e06cb09a..ecbab1a3 100644
--- a/src/core/gcal-calendar.c
+++ b/src/core/gcal-calendar.c
@@ -32,10 +32,10 @@ typedef struct
 
   gboolean            read_only;
 
-  guint               color_changed_handler_id;
-  guint               name_changed_handler_id;
-  guint               readonly_changed_handler_id;
-  guint               visible_changed_handler_id;
+  gulong              color_changed_handler_id;
+  gulong              name_changed_handler_id;
+  gulong              readonly_changed_handler_id;
+  gulong              visible_changed_handler_id;
   gboolean            initialized;
 } GcalCalendarPrivate;