Fixed compiler warnings


client/mysqladmin.cc:
  Fixed compiler warning
extra/yassl/taocrypt/src/twofish.cpp:
  Fixed compiler warning
libmysqld/Makefile.am:
  Use federatedx instead of federated
  (Should actually be removed)
mysql-test/mysql-test-run.pl:
  Fixed warning
mysql-test/valgrind.supp:
  Removed warning found on 64 bit Linux machine
storage/pbxt/src/cache_xt.cc:
  Fixed compile warning
storage/xtradb/include/buf0buf.ic:
  Fixed compiler warning