[gegl] operations/common/exp-combine: Simplify code

[Debarshi Ray <debarshir src gnome org>]

commit c817c5fab306cec7235324ad07931ccf539a7ad1
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Nov 22 08:15:20 2017 +0100

    operations/common/exp-combine: Simplify code
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790695

 operations/common/exp-combine.c |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/operations/common/exp-combine.c b/operations/common/exp-combine.c
index 755dc9a..5b3cbce 100644
--- a/operations/common/exp-combine.c
+++ b/operations/common/exp-combine.c
@@ -982,10 +982,7 @@ gegl_expcombine_get_exposures (GeglOperation        *operation,
       if (errno)
         {
           g_warning ("Invalid exposure values specified for exp-combine");
-          g_slist_foreach (exposures,
-                           (GFunc)gegl_expcombine_destroy_exposure,
-                           NULL);
-          g_slist_free    (exposures);
+          g_slist_free_full (exposures, (GDestroyNotify) gegl_expcombine_destroy_exposure);
           g_slist_free (inputs);
           gegl_expcombine_destroy_exposure (e);
 
@@ -1190,9 +1187,7 @@ gegl_expcombine_process (GeglOperation        *operation,
 
   /* Cleanup */
   g_free (hdr);
-
-  g_slist_foreach (exposures, (GFunc)gegl_expcombine_destroy_exposure, NULL);
-  g_slist_free    (exposures);
+  g_slist_free_full (exposures, (GDestroyNotify) gegl_expcombine_destroy_exposure);
 
   return TRUE;
 }