2.50:

svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r19820:HEAD

Notes:
* Game and sequencer RNA, and sequencer header are now out of date
  a bit after changes in trunk.
* I didn't know how to port these bugfixes, most likely they are
  not needed anymore.
  * Fix "duplicate strip" always increase the user count for ipo.
  * IPO pinning on sequencer strips was lost during Undo.

source/gameengine/Expressions/ErrorValue.cpp

@@ -34,13 +34,15 @@ effect: constructs a new CErrorValue containing errormessage "Error"
 
 
 
-CErrorValue::CErrorValue(STR_String errmsg)
+CErrorValue::CErrorValue(const char *errmsg)
 /*
 pre:
 effect: constructs a new CErrorValue containing errormessage errmsg
 */
 {
-  m_strErrorText = "[" + errmsg + "]";
+  m_strErrorText = "[";
+  m_strErrorText += errmsg;
+  m_strErrorText += "]";
   SetError(true);
 }