[vte] widget: a11y: Remove assert

[Christian Persch <chpe src gnome org>]

commit b333d66879963637099dc0bc5a702f50f34da67e
Author: Christian Persch <chpe src gnome org>
Date:   Tue Mar 16 17:55:47 2021 +0100

    widget: a11y: Remove assert
    
    This assert is getting hit more frequently now, e.g. by #340.
    Replace it with an if branch.
    
    Fixes: https://gitlab.gnome.org/GNOME/vte/-/issues/340

 src/vteaccess.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/vteaccess.cc b/src/vteaccess.cc
index c67afc40..8cf6feee 100644
--- a/src/vteaccess.cc
+++ b/src/vteaccess.cc
@@ -627,7 +627,8 @@ _vte_terminal_accessible_text_scrolled(VteTerminalAccessible* accessible,
                        if (len > i) {
                                /* snapshot_text always contains a trailing '\n',
                                 * insertion happens in front of it: bug 657960 */
-                               g_assert(i >= 1);
+                               // g_assert(i >= 1);
+                            if (i > 0)
                                emit_text_changed_insert(G_OBJECT(accessible),
                                                         priv->snapshot_text->str,
                                                         i - 1,