[vte] img.sh: Fix for newer ImageMagick

[Egmont Koblinger <egmontkob src gnome org>]

commit 0c0ad520265f4a8fc2e8caced228be1c8aa9553e
Author: Egmont Koblinger <egmont gmail com>
Date:   Sun Apr 30 23:29:36 2017 +0200

    img.sh: Fix for newer ImageMagick
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781865

 perf/img.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/perf/img.sh b/perf/img.sh
index 5756d2a..bae9560 100755
--- a/perf/img.sh
+++ b/perf/img.sh
@@ -34,7 +34,7 @@ declare -a upper lower
 upper=()
 lower=()
 
-convert -thumbnail ${COLUMNS}x "$1" txt:- |
+convert -thumbnail ${COLUMNS}x -define txt:compliance=SVG "$1" txt:- |
 while IFS=',:() ' read col row dummy red green blue rest; do
   if [ "$col" = "#" ]; then
     continue