[vte] emulation: Disregard bce when a new line appears at the bottom

[Egmont Koblinger <egmontkob src gnome org>]

commit 18171bcfeaf8f3bf4bcb8a04dfcff916a3fbc40b
Author: Egmont Koblinger <egmont gmail com>
Date:   Fri Oct 2 21:20:30 2015 +0200

    emulation: Disregard bce when a new line appears at the bottom
    
    Applying bce (background color erase) on a line that newly appears
    at the bottom when scrolling is a badly designed feature, causing
    many problems. Let's see if we break anything by disabling it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754596

 src/vte.cc |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/vte.cc b/src/vte.cc
index 70c1e55..014edd2 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -3409,11 +3409,13 @@ _vte_terminal_cursor_down (VteTerminal *terminal)
                }
 
                /* Match xterm and fill the new row when scrolling. */
+#if 0           /* Disable for now: see bug 754596. */
                 if (terminal->pvt->fill_defaults.attr.back != VTE_DEFAULT_BG) {
                        VteRowData *rowdata;
                        rowdata = _vte_terminal_ensure_row (terminal);
                         _vte_row_data_fill (rowdata, &terminal->pvt->fill_defaults, 
terminal->pvt->column_count);
                }
+#endif
        } else {
                /* Otherwise, just move the cursor down. */
                 terminal->pvt->cursor.row++;