[vte/vte-0-40] widget: Fix painting the preedit text near the right margin

[Egmont Koblinger <egmontkob src gnome org>]

commit ea8fcdb79359615bd774508a894fd37599645c37
Author: Egmont Koblinger <egmont gmail com>
Date:   Fri Oct 2 19:38:38 2015 +0200

    widget: Fix painting the preedit text near the right margin
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755668
    (cherry picked from commit d69645413f35ba6ebff9359a89bd121733a2e475)

 src/vte.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/vte.c b/src/vte.c
index 035f23c..ad10a2e 100644
--- a/src/vte.c
+++ b/src/vte.c
@@ -751,9 +751,9 @@ _vte_invalidate_cursor_once(VteTerminal *terminal, gboolean periodic)
                                columns++;
                        }
                }
-               if (preedit_width > 0) {
-                       columns += preedit_width;
-                       columns++; /* one more for the preedit cursor */
+               columns = MAX(columns, preedit_width);
+               if (column + columns > terminal->pvt->column_count) {
+                       column = MAX(0, terminal->pvt->column_count - columns);
                }
 
                _vte_debug_print(VTE_DEBUG_UPDATES,