[gexiv2] test: Fix argument order

[Jens Georg <jensgeorg src gnome org>]

commit 8fd2757f64a6533aafa4b2383d1a043814ddb538
Author: Jens Georg <mail jensge org>
Date:   Sat Jan 19 10:16:00 2019 +0100

    test: Fix argument order

 test/gexiv2-regression.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/test/gexiv2-regression.c b/test/gexiv2-regression.c
index 1d5ae67..fdde036 100644
--- a/test/gexiv2-regression.c
+++ b/test/gexiv2-regression.c
@@ -267,7 +267,7 @@ static void test_ggo_xx(void)
 
 static void test_ggo_27(void)
 {
-    gexiv2_metadata_register_xmp_namespace ("gnome", "http://www.gnome.org/xmp";);
+    gexiv2_metadata_register_xmp_namespace ("http://www.gnome.org/xmp";, "gnome");
 }
 
 int main(int argc, char *argv[static argc + 1])