post-review fixes

include/atomic/generic-msvc.h:
  prevent possible compiler warnings
include/lf.h:
  comments, better definition for LF_HASH_OVERHEAD
include/maria.h:
  define MARIA_CANNOT_ROLLBACK here
include/my_pthread.h:
  avoid possible name clash
include/waiting_threads.h:
  comments, const, move WT_RESOURCE to waiting_threads.c
mysql-test/suite/maria/r/maria_notembedded.result:
  new test
mysql-test/suite/maria/t/maria_notembedded.test:
  new test - 5-way deadlock
mysys/lf_hash.c:
  better definition for LF_HASH_OVERHEAD
mysys/my_static.c:
  comment
mysys/my_thr_init.c:
  casts
mysys/waiting_threads.c:
  comments, asserts, etc
server-tools/instance-manager/parse.cc:
  fix my_init_dynamic_array() to follow new calling conventions
sql/mysqld.cc:
  call wt_init after set_proper_floating_point_mode
sql/sql_class.h:
  comment
storage/maria/ha_maria.cc:
  move MARIA_CANNOT_ROLLBACK to a common header
storage/maria/ma_commit.c:
  comment
storage/maria/ma_write.c:
  comments, check for HA_ERR_FOUND_DUPP_KEY
storage/maria/trnman.c:
  comments, assert
storage/maria/trnman.h:
  comments
storage/maria/unittest/trnman-t.c:
  be paranoid
unittest/mysys/lf-t.c:
  comments
unittest/mysys/waiting_threads-t.c:
  comments, safety, memory leak

sql/sql_class.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2006 MySQL AB
+/* Copyright (C) 2000-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -1417,7 +1417,7 @@ public:
     THD_TRANS stmt;			// Trans for current statement
     bool on;                            // see ha_enable_transaction()
     XID_STATE xid_state;
-    WT_THD wt;
+    WT_THD wt;                          ///< for deadlock detection
     Rows_log_event *m_pending_rows_event;
 
     /*