[gimp] app: in GimpHistogramEditor, clear update timeout after validating

[N/A <ell src gnome org>]

commit 5b7806e13c73b3fd1047bf0203740da5229d70a5
Author: Ell <ell_se yahoo com>
Date:   Sun May 13 15:12:23 2018 -0400

    app: in GimpHistogramEditor, clear update timeout after validating
    
    In gimp_histogram_editor_validate(), clear the update timeout, so
    that if we validate the histogram before the timeout (in
    particular, if editor->histogram itself is clear) we don't end up
    unnecessarily re-validating it at the timeout.

 app/widgets/gimphistogrameditor.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/app/widgets/gimphistogrameditor.c b/app/widgets/gimphistogrameditor.c
index d303e23..595111a 100644
--- a/app/widgets/gimphistogrameditor.c
+++ b/app/widgets/gimphistogrameditor.c
@@ -512,6 +512,12 @@ gimp_histogram_editor_validate (GimpHistogramEditor *editor)
         }
 
       editor->recompute = FALSE;
+
+      if (editor->idle_id)
+        {
+          g_source_remove (editor->idle_id);
+          editor->idle_id = 0;
+        }
     }
 
   return (editor->histogram != NULL);