[vte] ring: Proper boundary checking for hyperlink position

[Egmont Koblinger <egmontkob src gnome org>]

commit d7df8276158dd448cf6813fb1039e7b5c464a1c2
Author: Egmont Koblinger <egmont gmail com>
Date:   Sun May 13 15:27:17 2018 +0200

    ring: Proper boundary checking for hyperlink position
    
    This fixes a rare crash around hyperlinks in a non grid aligned
    VTE widget when the mouse enters the extra padding at the bottom.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=795826

 src/ring.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/ring.cc b/src/ring.cc
index dd25224..fc78ce5 100644
--- a/src/ring.cc
+++ b/src/ring.cc
@@ -634,7 +634,7 @@ Ring::get_hyperlink_at_position(row_t position,
                 m_cached_row_num = (row_t)-1;
         }
 
-        if (G_UNLIKELY (position == (row_t)-1 || col == -1)) {
+        if (G_UNLIKELY (!contains(position) || col < 0)) {
                 if (update_hover_idx)
                         m_hyperlink_hover_idx = 0;
                 return 0;