Backlight: Fix setting brightness via gtk range widget

Signed-off-by: Eric Koegel <eric.koegel@gmail.com>

panel-plugins/brightness/brightness-button.c

@@ -318,9 +318,9 @@ brightness_button_press_event (GtkWidget *widget, GdkEventButton *ev)
 static void
 minus_clicked (GtkWidget *widget, BrightnessButton *button)
 {
-    gint level;
+    gint32 level;
     
-    level = (gint ) gtk_range_get_value (GTK_RANGE (button->priv->range));
+    level = (gint32) gtk_range_get_value (GTK_RANGE (button->priv->range));
     
     if ( level > 0 )
 	gtk_range_set_value (GTK_RANGE (button->priv->range), level - 1);
@@ -329,10 +329,10 @@ minus_clicked (GtkWidget *widget, BrightnessButton *button)
 static void
 plus_clicked (GtkWidget *widget, BrightnessButton *button)
 {
-    gint level, max_level;
+    gint32 level, max_level;
     
     max_level = xfpm_brightness_get_max_level (button->priv->brightness);
-    level = (gint ) gtk_range_get_value (GTK_RANGE (button->priv->range));
+    level = (gint32) gtk_range_get_value (GTK_RANGE (button->priv->range));
     
     if ( level < max_level )
 	gtk_range_set_value (GTK_RANGE (button->priv->range), level + 1);
@@ -343,7 +343,7 @@ range_value_changed (GtkWidget *widget, BrightnessButton *button)
 {
     gint32 range_level, hw_level;
     
-    range_level = (gint) gtk_range_get_value (GTK_RANGE (button->priv->range));
+    range_level = (gint32) gtk_range_get_value (GTK_RANGE (button->priv->range));
     
     xfpm_brightness_get_level (button->priv->brightness, &hw_level);