[devhelp] util: compile get_screen_dpi() only when using webkit2

[Aleksander Morgado <aleksm src gnome org>]

commit a0216f4ced6aa77defe944c705c85ab9a3d7324d
Author: Aleksander Morgado <aleksander lanedo com>
Date:   Tue Mar 6 14:26:02 2012 +0100

    util: compile get_screen_dpi() only when using webkit2

 src/dh-util.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/dh-util.c b/src/dh-util.c
index 87de1bc..74312d2 100644
--- a/src/dh-util.c
+++ b/src/dh-util.c
@@ -667,6 +667,7 @@ view_destroy_cb (GtkWidget *view,
         views = g_list_remove (views, view);
 }
 
+#ifdef HAVE_WEBKIT2
 static gdouble
 get_screen_dpi (GdkScreen *screen)
 {
@@ -682,6 +683,7 @@ get_screen_dpi (GdkScreen *screen)
 
         return dp / di;
 }
+#endif
 
 static guint
 dh_util_convert_font_size_to_pixels (GtkWidget *widget,