include/errmsg.h:
  New libmysql error status code CR_NO_STMT_METADATA
libmysql/errmsg.c:
  Error message for CR_STMT_NO_METADATA.
  Adding an empty line to shorten further diffs when new error
  messages are added (as suggested by Monty).
libmysql/libmysql.c:
  Return error from mysql_stmt_bind_result() if the statement contains
  no metadata.
  A few comments fixed.
tests/client_test.c:
  Tests fixed: mysql_stmt_bind_result now returns error if there is no
  metadata.