[gtk+] scrolledwindow: fix left/right thinko for scrollbar style classes

[Cosimo Cecchi <cosimoc src gnome org>]

commit 1395f3a8383f2d46734bc65a54756e2b83013b40
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Mar 2 16:08:19 2016 -0800

    scrolledwindow: fix left/right thinko for scrollbar style classes
    
    "left" and "right" were inverted, preumably because the position type
    parameter refers to the scrolled window position, and not the scrollbar
    itself.

 gtk/gtkscrolledwindow.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index 0df1a62..3b62519 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -477,13 +477,13 @@ update_scrollbar_positions (GtkScrolledWindow *scrolled_window)
           (priv->window_placement == GTK_CORNER_TOP_LEFT ||
            priv->window_placement == GTK_CORNER_BOTTOM_LEFT)))
         {
-          gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
-          gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
+          gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
+          gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
         }
       else
         {
-          gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
-          gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
+          gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
+          gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
         }
     }
 }