textview: fix yoffset position when top_margin is set

This doesn't need to be included in the calculation or it will cause the
yoffset to continually shift while the window is resized.

Fixes #4134

diff --git a/gtk/gtktextview.c b/gtk/gtktextview.c
index 71c48ab844302abaeb5cc69594bb0f3ffea839cd..3f5836f0aa9f2dcff2d40b240f63e3b99fb893c4 100644 (file)
--- a/gtk/gtktextview.c
+++ b/gtk/gtktextview.c
@@ -4892,7 +4892,7 @@ changed_handler (GtkTextLayout     *layout,
 
       gtk_text_layout_get_line_yrange (layout, &first, &new_first_para_top, NULL);
 
-      old_first_para_top = priv->yoffset - priv->first_para_pixels + priv->top_margin;
+      old_first_para_top = priv->yoffset - priv->first_para_pixels;
 
       if (new_first_para_top != old_first_para_top)
         {