[gimp] Issue #8605: Unportable test(1) operator in tools/extract-vector-icon.sh

[Jehan <jehanp src gnome org>]

commit 22dee60a9dffa75bd8b05243d79a43360034b20c
Author: Thomas Klausner <wiz gatalith at>
Date:   Sat Sep 10 23:08:06 2022 +0200

    Issue #8605: Unportable test(1) operator in tools/extract-vector-icon.sh

 tools/extract-vector-icon.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tools/extract-vector-icon.sh b/tools/extract-vector-icon.sh
index 3282276546..e1e213fe50 100755
--- a/tools/extract-vector-icon.sh
+++ b/tools/extract-vector-icon.sh
@@ -35,7 +35,7 @@ fi
 compute_viewbox="$(pwd)/../../tools/compute-svg-viewbox"
 source="$1"
 id="$2"
-if [ "$#" == 4 ]; then
+if [ "$#" = 4 ]; then
   # The expected display width/height for the image.
   width="$3"
   height="$4"
@@ -107,7 +107,7 @@ rm -f $svg_temp
 
 # The finale SVG file with properly set viewBox.
 svg="$svg_start  $viewBox"
-if [ "$#" == 5 ]; then
+if [ "$#" = 5 ]; then
   svg="$svg
   width=\"$width\"
   height=\"$height\""