[evince] EvPixbufCache: Handle backends that don't render a selection

[Carlos Garcia Campos <carlosgc src gnome org>]

commit c5a338c00253aeb88901c574ea150b3bd83634e7
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Mon Mar 3 12:44:44 2014 -0500

    EvPixbufCache: Handle backends that don't render a selection
    
    Handle the case where ev_selection_render_selection() doesn't actually
    render a surface - this happens when a backend doesn't implement
    render_selection().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=723431

 libview/ev-pixbuf-cache.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/libview/ev-pixbuf-cache.c b/libview/ev-pixbuf-cache.c
index 0f4403e..e9019bd 100644
--- a/libview/ev-pixbuf-cache.c
+++ b/libview/ev-pixbuf-cache.c
@@ -296,7 +296,8 @@ copy_job_to_job_info (EvJobRender   *job_render,
 
                job_info->selection_points = job_render->selection_points;
                job_info->selection = cairo_surface_reference (job_render->selection);
-               set_device_scale_on_surface (job_info->selection, job_info->device_scale);
+                if (job_info->selection)
+                        set_device_scale_on_surface (job_info->selection, job_info->device_scale);
                job_info->selection_scale = job_render->scale * job_info->device_scale;
                g_assert (job_info->selection_points.x1 >= 0);
 
@@ -1096,7 +1097,8 @@ ev_pixbuf_cache_get_selection_surface (EvPixbufCache   *pixbuf_cache,
                                               old_points,
                                               job_info->selection_style,
                                               &text, &base);
-               set_device_scale_on_surface (job_info->selection, job_info->device_scale);
+                if (job_info->selection)
+                        set_device_scale_on_surface (job_info->selection, job_info->device_scale);
                job_info->selection_points = job_info->target_points;
                job_info->selection_scale = scale * job_info->device_scale;
                g_object_unref (rc);