[gimp] libgimpbase: fix crash caused by the previous commit

[Jacob Boerema <jboerema src gnome org>]

commit 5cf1ec62b47189607bae03a989dafbaea96cb4f7
Author: Jacob Boerema <jgboerema gmail com>
Date:   Thu Jun 2 17:45:13 2022 -0400

    libgimpbase: fix crash caused by the previous commit
    
    In other cases we need to free value, but in this case it was used and
    trying to free it caused a GIMP to crash.
    Let's duplicate value, so we don't need to special case our g_free.

 libgimpbase/gimpmetadata.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libgimpbase/gimpmetadata.c b/libgimpbase/gimpmetadata.c
index 7f63d0223d..6771a435f9 100644
--- a/libgimpbase/gimpmetadata.c
+++ b/libgimpbase/gimpmetadata.c
@@ -730,7 +730,7 @@ gimp_metadata_deserialize_text (GMarkupParseContext  *context,
               else
                 {
                   values = g_renew (gchar *, values, length + 2);
-                  values[length]     = value;
+                  values[length]     = g_strdup (value);
                   values[length + 1] = NULL;
 
                   gexiv2_metadata_try_set_tag_multiple (g2_metadata,