by Nico Golde <nion@debian.org>, slightly modified version
from Eugenio Paolantonio <me@medesimo.eu>
Do not build filename if a working full path is given.
Fixes #644756.
Index: openbox-3.5.0/obt/xml.c
===================================================================
--- ./obt/xml.c	2011-10-30 14:13:07.000000000 +0100
+++ ./obt/xml.c	2011-10-30 14:13:10.000000000 +0100
@@ -144,10 +144,13 @@
         gchar *path;
         struct stat s;
 
-        if (!domain && !filename) /* given a full path to the file */
+        if (!domain && !filename){ /* given a full path to the file */
             path = g_strdup(it->data);
-        else
+        } else if(filename && filename[0] == '/' && stat(filename, &s) >= 0) {
+            path = g_strdup(filename);
+        } else {
             path = g_build_filename(it->data, domain, filename, NULL);
+        }
 
         if (stat(path, &s) >= 0) {
             /* XML_PARSE_BLANKS is needed apparently, or the tree can end up