[vte] draw: Pass the known string length instead of -1

[Christian Persch <chpe src gnome org>]

commit ec28a7535f45f525ea966cad28a594a01daf4236
Author: Christian Persch <chpe gnome org>
Date:   Sun Dec 13 19:08:23 2015 +0100

    draw: Pass the known string length instead of -1

 src/vtedraw.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/vtedraw.cc b/src/vtedraw.cc
index 0409b76..ed9d9ae 100644
--- a/src/vtedraw.cc
+++ b/src/vtedraw.cc
@@ -671,7 +671,7 @@ font_info_get_unistr_info (struct font_info *info,
 
        g_string_set_size (info->string, 0);
        _vte_unistr_append_to_string (c, info->string);
-       pango_layout_set_text (info->layout, info->string->str, -1);
+       pango_layout_set_text (info->layout, info->string->str, info->string->len);
        pango_layout_get_extents (info->layout, NULL, &logical);
 
        uinfo->width = PANGO_PIXELS_CEIL (logical.width);