[gtksourceview] gutterrenderermarks: free mark slist in query-tooltip

[Christian Hergert <chergert src gnome org>]

commit 99dabb4d44f481c7077c7c51ac6acb6b7866718e
Author: Christian Hergert <chergert redhat com>
Date:   Tue Feb 19 11:59:28 2019 -0800

    gutterrenderermarks: free mark slist in query-tooltip
    
    After querying the marks, the allocated list used to collect this must
    be freed.
    
    Related to #39

 gtksourceview/gtksourcegutterrenderermarks.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/gtksourceview/gtksourcegutterrenderermarks.c b/gtksourceview/gtksourcegutterrenderermarks.c
index 8978b313..8fdcb6df 100644
--- a/gtksourceview/gtksourcegutterrenderermarks.c
+++ b/gtksourceview/gtksourcegutterrenderermarks.c
@@ -336,6 +336,7 @@ gutter_renderer_query_tooltip (GtkSourceGutterRenderer *renderer,
        GSList *marks;
        GtkSourceView *view;
        GtkSourceBuffer *buffer;
+       gboolean ret;
 
        view = GTK_SOURCE_VIEW (gtk_source_gutter_renderer_get_view (renderer));
        buffer = GTK_SOURCE_BUFFER (gtk_text_view_get_buffer (GTK_TEXT_VIEW (view)));
@@ -352,7 +353,11 @@ gutter_renderer_query_tooltip (GtkSourceGutterRenderer *renderer,
 
                marks = g_slist_reverse (marks);
 
-               return set_tooltip_widget_from_marks (view, tooltip, marks);
+               ret = set_tooltip_widget_from_marks (view, tooltip, marks);
+
+               g_slist_free (marks);
+
+               return ret;
        }
 
        return FALSE;