Removed compiler warnings


scripts/make_win_src_distribution.sh:
  Added option --dirname
  Also copy sql-common directory
  Create mysql data files even if mysqld is not installed
scripts/mysql_create_system_tables.sh:
  Update for usage with make_win_src_distribution
scripts/mysql_install_db.sh:
  Update for usage with make_win_src_distribution
sql-common/client.c:
  Portability fix
sql/item_cmpfunc.cc:
  Removed compiler warning
sql/sql_acl.cc:
  Indentation cleanup
  Removed compiler warning
sql/sql_parse.cc:
  Removed compiler warning
sql/sql_select.cc:
  Removed compiler warning
sql/sql_yacc.yy:
  Removed compiler warning
strings/ctype-utf8.c:
  Removed compiler warning