Bug#13238 mysqldump and mysqladmin hangs
  Avoid recursion into init_available_charsets.
  Serg's version didn't work for me: I got 
  double mutex locking.
  Pushing this version instead
  (It was approved by Serg anyway)


mysys/charset.c:
  Bug#13238 mysqldump and mysqladmin hangs
  Avoid recursion into init_available_charsets.
  Serg's version didn't work for me: I got 
  double mutex locking.
  Pushing this version instead
  (It was approved by Serg anyway)