[vte] terminal: Adjust variable type

[Christian Persch <chpe src gnome org>]

commit 78031f362af3933a70a40ad9e3ea5cd3ba2df590
Author: Christian Persch <chpe src gnome org>
Date:   Tue May 12 00:22:59 2020 +0200

    terminal: Adjust variable type
    
    AFAICT the computation will never exceed the int range, but
    simply use auto here to be sure, and remove a FIXME.
    
    https://gitlab.gnome.org/GNOME/vte/-/issues/244#note_796941

 src/vte.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/vte.cc b/src/vte.cc
index e8825f5b..034c3062 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -2090,8 +2090,7 @@ Terminal::ensure_row()
        VteRowData *row;
 
        /* Figure out how many rows we need to add. */
-        //FIXMEchpe use long, not int
-       int delta = m_screen->cursor.row - _vte_ring_next(m_screen->row_data) + 1;
+       auto const delta = m_screen->cursor.row - _vte_ring_next(m_screen->row_data) + 1;
        if (delta > 0) {
                row = insert_rows(delta);
                adjust_adjustments();