all: fix GCC uninitialized variables warnings

src/gcal-manager.c

@@ -1382,6 +1382,7 @@ gcal_manager_get_event_reminders (GcalManager *manager,
 
           type = NULL;
           time = NULL;
+	  number = 0;
           alarm = e_cal_component_get_alarm (event, l->data);
 
           e_cal_component_alarm_get_action (alarm, &action);

src/gcal-week-view.c

@@ -707,7 +707,7 @@ gcal_week_view_scroll_event (GtkWidget      *widget,
     }
   else
     {
-      GtkWidget *range;
+      GtkWidget *range = NULL;
 
       if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN)
         range = priv->vscrollbar;