[gnome-builder] vim: fix scrolloff at beginning of document

[Christian Hergert <chergert src gnome org>]

commit fbb1252c74ea299fde96fd3a79a9e3dc4880d2a7
Author: Florian Bäuerle <florian bae gmail com>
Date:   Sun Jan 11 18:24:39 2015 +0100

    vim: fix scrolloff at beginning of document
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742767
    
    Signed-off-by: Florian Bäuerle <florian bae gmail com>

 src/vim/gb-source-vim.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/vim/gb-source-vim.c b/src/vim/gb-source-vim.c
index 3bec5b2..318682b 100644
--- a/src/vim/gb-source-vim.c
+++ b/src/vim/gb-source-vim.c
@@ -2792,7 +2792,7 @@ gb_source_vim_move_page (GbSourceVim                 *vim,
       adjusted_scroll = gb_source_vim_adjust_scroll (vim, line, GB_SOURCE_VIM_ALIGNMENT_KEEP);
       break;
     case GB_SOURCE_VIM_PAGE_UP:
-      line = gtk_text_iter_get_line (&iter_top);
+      line = MAX (vim->priv->scroll_off, gtk_text_iter_get_line (&iter_top));
       adjusted_scroll = gb_source_vim_adjust_scroll (vim, line, GB_SOURCE_VIM_ALIGNMENT_BOTTOM);
       break;
     case GB_SOURCE_VIM_PAGE_DOWN: