[gthumb] equalize: removed unused variable

[Paolo Bacchilega <paobac src gnome org>]

commit f5462f18af5836ad8e1ee4ed1f821c12511b008b
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Sep 21 16:47:32 2013 +0200

    equalize: removed unused variable

 extensions/file_tools/gth-file-tool-equalize.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/extensions/file_tools/gth-file-tool-equalize.c b/extensions/file_tools/gth-file-tool-equalize.c
index bff2459..7e5507a 100644
--- a/extensions/file_tools/gth-file-tool-equalize.c
+++ b/extensions/file_tools/gth-file-tool-equalize.c
@@ -30,9 +30,8 @@ G_DEFINE_TYPE (GthFileToolEqualize, gth_file_tool_equalize, GTH_TYPE_FILE_TOOL)
 
 
 typedef struct {
-       GtkWidget  *viewer_page;
-       long      **cumulative;
-       double      factor;
+       long   **cumulative;
+       double   factor;
 } EqualizeData;
 
 
@@ -137,7 +136,6 @@ equalize_destroy_data (gpointer user_data)
        EqualizeData *equalize_data = user_data;
 
        gth_cumulative_histogram_free (equalize_data->cumulative);
-       g_object_unref (equalize_data->viewer_page);
        g_free (equalize_data);
 }
 
@@ -156,7 +154,6 @@ gth_file_tool_equalize_activate (GthFileTool *base)
                return;
 
        equalize_data = g_new0 (EqualizeData, 1);
-       equalize_data->viewer_page = g_object_ref (viewer_page);
        task = gth_image_viewer_task_new (GTH_IMAGE_VIEWER_PAGE (viewer_page),
                                          _("Equalizing image histogram"),
                                          NULL,