fix typo in `length' documentation

[Joseph P. Skudlarek]

========================================================================
diff -cr data.texi{-ORIG,}
========================================================================
*** data.texi-ORIG      Fri Aug 31 22:16:22 2001
--- data.texi   Fri Aug 31 22:37:30 2001
***************
*** 150,156 ****
  
  @anchor{doc-length}
  @deftypefn {Built-in Function} {} length (@var{a})
! Return the `lenghth' of the object @var{a}.  For matrix objects, the
  length is the number of rows or columns, whichever is greater (this
  odd definition is used for compatibility with Matlab).
  @end deftypefn
--- 150,156 ----
  
  @anchor{doc-length}
  @deftypefn {Built-in Function} {} length (@var{a})
! Return the `length' of the object @var{a}.  For matrix objects, the
  length is the number of rows or columns, whichever is greater (this
  odd definition is used for compatibility with Matlab).
  @end deftypefn
========================================================================
Suggested ChangeLog
========================================================================
2001-08-31  Joseph P. Skudlarek  <address@hidden>

        * interpreter/data.texi (Object Sizes): Fix spelling of 'length'.

========================================================================