Allow to reuse an existing session by fixing a bug in session comparison.
See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=573258

Index: xrdp/sesman/session.c
===================================================================
--- xrdp.orig/sesman/session.c	2012-09-29 12:51:50.115200445 +0200
+++ xrdp/sesman/session.c	2012-09-29 12:54:40.302890162 +0200
@@ -56,6 +56,19 @@
 {
   struct session_chain* tmp;
 
+  /* convert from SCP_SESSION_TYPE namespace to SESMAN_SESSION_TYPE namespace */
+  switch (type)
+  {
+    case SCP_SESSION_TYPE_XVNC:
+      type = SESMAN_SESSION_TYPE_XVNC;
+      break;
+    case SCP_SESSION_TYPE_XRDP:
+      type = SESMAN_SESSION_TYPE_XRDP;
+      break;
+    default:
+      return 0;
+  }
+
   /*THREAD-FIX require chain lock */
   lock_chain_acquire();