[gimp] Bug 777403 - Calling (file-png-get-defaults) crashes the file-png plug-in

[Michael Schumacher <schumaml src gnome org>]

commit f658ea407153b0676f8e6cbb5010baeab5e93b0d
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Fri Dec 29 07:36:58 2017 +0100

    Bug 777403 - Calling (file-png-get-defaults) crashes the file-png plug-in
    
    commit 21bed1e2fb438fa5721bddb0573a724ae0024455
    
    moved the lines
    
    +  run_mode = param[0].data.d_int32;
    +
    
    without considering the plug-in registers parameterless
    procedures

 plug-ins/common/file-png.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-png.c b/plug-ins/common/file-png.c
index 57556aa..d3327f2 100644
--- a/plug-ins/common/file-png.c
+++ b/plug-ins/common/file-png.c
@@ -428,13 +428,14 @@ run (const gchar      *name,
      GimpParam       **return_vals)
 {
   static GimpParam  values[10];
-  GimpRunMode       run_mode;
+  GimpRunMode       run_mode = GIMP_RUN_NONINTERACTIVE;
   GimpPDBStatusType status = GIMP_PDB_SUCCESS;
   gint32            image_ID;
   gint32            drawable_ID;
   GError           *error  = NULL;
 
-  run_mode = param[0].data.d_int32;
+  if (nparams)
+    run_mode = param[0].data.d_int32;
 
   INIT_I18N ();
   gegl_init (NULL, NULL);