[gtksourceview] Use new GtkScrollable interface

[Paolo Borelli <pborelli src gnome org>]

commit f00362880dd4307df7e29a4591bac4614821fa7d
Author: Paolo Borelli <pborelli gnome org>
Date:   Sat Oct 23 17:14:29 2010 +0200

    Use new GtkScrollable interface

 configure.ac                  |    2 +-
 gtksourceview/gtksourceview.c |   10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d69cf02..ad974f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,7 +30,7 @@ LT_INIT([disable-static])
 AC_CHECK_HEADERS([unistd.h])
 
 # Dependencies
-GTK_REQUIRED_VERSION=2.91.0
+GTK_REQUIRED_VERSION=2.91.2
 LIBXML_REQUIRED_VERSION=2.6.0
 GLADE_UI_REQUIRED=3.2
 
diff --git a/gtksourceview/gtksourceview.c b/gtksourceview/gtksourceview.c
index 2c0614b..3752604 100644
--- a/gtksourceview/gtksourceview.c
+++ b/gtksourceview/gtksourceview.c
@@ -1912,7 +1912,7 @@ scroll_to_insert (GtkSourceView *view,
 		 * _scroll_to_iter will cause it to move and the
 		 * insert mark is already visible vertically. */
 
-		adjustment = gtk_text_view_get_vadjustment (GTK_TEXT_VIEW (view));
+		adjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (view));
 		position = gtk_adjustment_get_value (adjustment);
 
 		/* Must use _to_iter as _to_mark scrolls in an
@@ -2412,7 +2412,7 @@ gtk_source_view_paint_line_background (GtkTextView    *text_view,
 	GdkRectangle line_rect;
 	gint win_y;
 	gint margin;
-	GtkAdjustment *hadjustment = gtk_text_view_get_hadjustment (text_view);
+	GtkAdjustment *hadjustment;
 
 	gtk_text_view_get_visible_rect (text_view, &visible_rect);
 
@@ -2428,11 +2428,17 @@ gtk_source_view_paint_line_background (GtkTextView    *text_view,
 	line_rect.y = win_y;
 	line_rect.height = height;
 
+	hadjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (text_view));
+
 	if (hadjustment)
+	{
 		margin = gtk_text_view_get_left_margin (text_view) -
 			 (int) gtk_adjustment_get_value (hadjustment);
+	}
 	else
+	{
 		margin = gtk_text_view_get_left_margin (text_view);
+	}
 
 	line_rect.x += MAX (0, margin - 1);