[gtk+] Fix another typo

[Kalev Lember <klember src gnome org>]

commit 71ac15ec2fdaf55dae5508a4e9ac317188ad0d0d
Author: Kalev Lember <kalevlember gmail com>
Date:   Sun Jun 15 11:24:39 2014 +0200

    Fix another typo

 testsuite/gtk/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/testsuite/gtk/Makefile.am b/testsuite/gtk/Makefile.am
index a41d848..6e6abb1 100644
--- a/testsuite/gtk/Makefile.am
+++ b/testsuite/gtk/Makefile.am
@@ -132,7 +132,7 @@ test_icontheme =                                    \
        icons/index.theme                               \
        icons/16x16/simple.png                          \
        icons/16x16/twosize-fixed.svg                   \
-       icons/16x16s/twosize.png                        \
+       icons/16x16s/twosize.svg                        \
        icons/32x32/only32-symbolic.svg                 \
        icons/32x32/twosize-fixed.svg                   \
        icons/32x32s/twosize.svg                        \