[gimp] plug-ins: use g_file_peek_path() instead of g_file_get_path().

[Jehan <jehanp src gnome org>]

commit 545257226a20dc09cdc60c67744a5cded70d9b46
Author: Jehan <jehan girinstud io>
Date:   Fri Oct 1 12:12:35 2021 +0200

    plug-ins: use g_file_peek_path() instead of g_file_get_path().
    
    Freeing the path immediately could lead to a free-after-use error as we
    used it for an error message when the file pointer failed to be created,
    as reported by Massimo (thanks again!).
    
    Using g_file_peek_path() has also other advantages, such as being less
    error-prone, but also possibly more efficient. First looking at the
    implementation, for local files, we already have the path around, so no
    additional memory allocation even needs to happen. As for the generic
    code path, it would still allocate a new string, yet cache it and reuse
    it when needed later. This makes the _peek_ call much better for quick
    peek-use-discard usage.

 plug-ins/file-dds/ddswrite.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)
---
diff --git a/plug-ins/file-dds/ddswrite.c b/plug-ins/file-dds/ddswrite.c
index 177387305a..04df36aac6 100644
--- a/plug-ins/file-dds/ddswrite.c
+++ b/plug-ins/file-dds/ddswrite.c
@@ -512,12 +512,11 @@ write_dds (GFile         *file,
            GimpProcedure *procedure,
            GObject       *config)
 {
-  gchar *filename;
-  FILE  *fp;
-  gint   rc = 0;
-  gint   compression;
-  gint   mipmaps;
-  gint   savetype;
+  FILE *fp;
+  gint  rc = 0;
+  gint  compression;
+  gint  mipmaps;
+  gint  savetype;
 
   g_object_get (config,
                 "compression-format", &compression,
@@ -569,13 +568,11 @@ write_dds (GFile         *file,
         }
     }
 
-  filename = g_file_get_path (file);
-  fp = g_fopen (filename, "wb");
-  g_free (filename);
+  fp = g_fopen (g_file_peek_path (file), "wb");
 
   if (! fp)
     {
-      g_message ("Error opening %s", filename);
+      g_message ("Error opening %s", g_file_peek_path (file));
       return GIMP_PDB_EXECUTION_ERROR;
     }