[gimp] Bug 794023 - Bad/Double free bugs found by scan-build.

[Jehan Pagès <jehanp src gnome org>]

commit c9d9b5535bc5f67016c973dfcbf3d2cb3b3606c8
Author: Jehan <jehan girinstud io>
Date:   Sat Mar 3 16:41:43 2018 +0100

    Bug 794023 - Bad/Double free bugs found by scan-build.
    
    In case of error in gimp_prop_eval_parse_reference(), we were obviously
    freeing the string which had just been allocated by g_strdup(), not the
    pointer to this string.
    Thanks to Massimo for raising this issue.

 app/propgui/gimppropgui-eval.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/propgui/gimppropgui-eval.c b/app/propgui/gimppropgui-eval.c
index ca5d843..d182a86 100644
--- a/app/propgui/gimppropgui-eval.c
+++ b/app/propgui/gimppropgui-eval.c
@@ -882,7 +882,7 @@ gimp_prop_eval_parse_reference (GObject      *config,
 
   if (*error)
     {
-      g_free (ref_key);
+      g_free (*ref_key);
 
       return FALSE;
     }