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* Game and sequencer RNA, and sequencer header are now out of date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/GameLogic/SCA_RandomNumberGenerator.cpp

@@ -59,6 +59,7 @@
 SCA_RandomNumberGenerator::SCA_RandomNumberGenerator(long seed) {
 	// int mti = N + 1; /*unused*/
 	m_seed = seed;
+	m_refcount = 1;
 	SetStartVector();
 }