[evince] [libdocument] Fix borken ev_tmp_filename_unlink()

[Carlos Garcia Campos <carlosgc src gnome org>]

commit b4b43ea75d5b9f70b11a5f128f12e32e0c61bcb9
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Tue May 4 14:03:38 2010 +0200

    [libdocument] Fix borken ev_tmp_filename_unlink()
    
    Check file is under evince tempdir rather than global tempdir and fix
    the prefix check.

 libdocument/ev-file-helpers.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index 6483e2d..edd4e4f 100644
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -319,13 +319,13 @@ ev_mkdtemp (const char        *template,
 void
 ev_tmp_filename_unlink (const gchar *filename)
 {
-	const gchar *tempdir;
-	
 	if (!filename)
 		return;
 
-	tempdir = g_get_tmp_dir ();
-	if (g_str_has_prefix (filename, tempdir) == 0) {
+	if (!tmp_dir)
+		return;
+
+	if (g_str_has_prefix (filename, tmp_dir)) {
 		g_unlink (filename);
 	}
 }