[evince] a11y: checking null before setting text_buffer text

[Daniel Garcia Moreno <danigm src gnome org>]

commit 88aee427ed3c45f7d84216f5512fbb07ce164edd
Author: danigm <danigm wadobo com>
Date:   Mon Mar 21 08:17:35 2011 +0100

    a11y: checking null before setting text_buffer text

 libview/ev-view-accessible.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libview/ev-view-accessible.c b/libview/ev-view-accessible.c
index a16a59f..5834af2 100644
--- a/libview/ev-view-accessible.c
+++ b/libview/ev-view-accessible.c
@@ -116,7 +116,8 @@ ev_view_accessible_get_text_buffer (EvViewAccessible *accessible, EvView *view)
 	}
 
 	retval = ev_page_cache_get_text (page_cache, view->current_page);
-	gtk_text_buffer_set_text (priv->buffer, retval, -1);
+	if (retval)
+		gtk_text_buffer_set_text (priv->buffer, retval, -1);
 
 	return priv->buffer;
 }