[gupnp-tools] universal-cp: Fix missing format string

[Jens Georg <jensgeorg src gnome org>]

commit d738baae3bffaf6a8dfc12f5fe1ea13168fe2e48
Author: Jens Georg <mail jensge org>
Date:   Tue Jun 22 10:29:08 2021 +0200

    universal-cp: Fix missing format string
    
    Fixes #20

 src/universal-cp/main.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/universal-cp/main.c b/src/universal-cp/main.c
index b6557c8..ce6e9b3 100644
--- a/src/universal-cp/main.c
+++ b/src/universal-cp/main.c
@@ -70,11 +70,10 @@ parse_uda_version (const gchar *option_name,
         } else if (g_str_equal (value, "1.1")) {
                 uda_version = GSSDP_UDA_VERSION_1_1;
         } else {
-                char *msg = g_strconcat ("Invalid UDA version: ", value, NULL);
                 g_set_error (error,
                              G_IO_ERROR,
                              G_IO_ERROR_INVALID_ARGUMENT,
-                             msg);
+                             "Invalid UDA version: %s", value);
                 g_free (msg);
 
                 return FALSE;