[evolution] e_day_view_show_popup_menu: Avoid runtime warning from tooltip_get_view_event

[Milan Crha <mcrha src gnome org>]

commit 8d2e1340cf46d0e630448c5f9fe4ed02229cd06b
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jul 21 15:53:32 2014 +0200

    e_day_view_show_popup_menu: Avoid runtime warning from tooltip_get_view_event
    
    The e_day_view_show_popup_menu() can be called with event_num = -1,
    which is when the mouse doesn't hover above any event. The function
    tooltip_get_view_event() claims a runtime warning in this case, thus
    avoid it by properly testing the passed-in value.

 calendar/gui/e-day-view.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/calendar/gui/e-day-view.c b/calendar/gui/e-day-view.c
index 8f09d27..9950da6 100644
--- a/calendar/gui/e-day-view.c
+++ b/calendar/gui/e-day-view.c
@@ -4502,7 +4502,10 @@ e_day_view_show_popup_menu (EDayView *day_view,
                             gint day,
                             gint event_num)
 {
-       EDayViewEvent *pevent = tooltip_get_view_event (day_view, day, event_num);
+       EDayViewEvent *pevent = NULL;
+
+       if (event_num >= 0)
+               pevent = tooltip_get_view_event (day_view, day, event_num);
 
        if (pevent && pevent->canvas_item)
                tooltip_destroy (day_view, pevent->canvas_item);