[gimp] plug-ins: fix static analysis warning.

[Jehan <jehanp src gnome org>]

commit 4dcbafc29224cbee9ef4c17a6eb31dc05e8f81bb
Author: Jehan <jehan girinstud io>
Date:   Thu Oct 21 11:59:10 2021 +0200

    plug-ins: fix static analysis warning.
    
    I had completely forgotten about Coverity Scan but today received an
    email with some new scan results. This was one of the warnings that we
    had a possible resource leak.
    
    In truth, this is mostly a false positive since gimp_export_image() will
    flatten the image. Yet why not be thorough…

 plug-ins/common/file-raw-data.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/plug-ins/common/file-raw-data.c b/plug-ins/common/file-raw-data.c
index 3b5b6ae320..82dc65a970 100644
--- a/plug-ins/common/file-raw-data.c
+++ b/plug-ins/common/file-raw-data.c
@@ -594,6 +594,12 @@ raw_save (GimpProcedure        *procedure,
       g_set_error (&error, G_FILE_ERROR, 0,
                    _("RAW export does not support multiple layers."));
 
+      if (export == GIMP_EXPORT_EXPORT)
+        {
+          gimp_image_delete (image);
+          g_free (drawables);
+        }
+
       return gimp_procedure_new_return_values (procedure,
                                                GIMP_PDB_CALLING_ERROR,
                                                error);