[gtk+/filesystemmodel] Make the code match the docs in _gtk_file_system_model_clear_cache()

[Federico Mena Quintero <federico src gnome org>]

commit fdafb0ec309b57b1dc3abdd0e3c28ca7519b16b7
Author: Federico Mena Quintero <federico novell com>
Date:   Fri Sep 4 13:53:46 2009 -0500

    Make the code match the docs in _gtk_file_system_model_clear_cache()
    
    Signed-off-by: Federico Mena Quintero <federico novell com>

 gtk/gtkfilesystemmodel.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkfilesystemmodel.c b/gtk/gtkfilesystemmodel.c
index 97027d2..e5dad79 100644
--- a/gtk/gtkfilesystemmodel.c
+++ b/gtk/gtkfilesystemmodel.c
@@ -1920,7 +1920,7 @@ _gtk_file_system_model_thaw_updates (GtkFileSystemModel *model)
 }
 
 /**
- * _gtk_file_system_model_clear_cached_values:
+ * _gtk_file_system_model_clear_cache:
  * @model: a #GtkFileSystemModel
  * @column: the column to clear or -1 for all columns
  *
@@ -1941,7 +1941,7 @@ _gtk_file_system_model_clear_cache (GtkFileSystemModel *model,
   g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
   g_return_if_fail (column >= -1 && (guint) column < model->n_columns);
 
-  if (column)
+  if (column > -1)
     {
       start = column;
       end = column + 1;