typo fix

[Tom Tromey]

I found a typo in lisp.h, patch appended.

Tom

Index: lisp.h
===================================================================
RCS file: /sources/emacs/emacs/src/lisp.h,v
retrieving revision 1.604
diff -u -c -r1.604 lisp.h
cvs diff: conflicting specifications of output style
*** lisp.h      8 Jan 2008 20:44:17 -0000       1.604
--- lisp.h      13 Jan 2008 19:11:17 -0000
***************
*** 1425,1431 ****
     All callers should assure that at least this size of memory is
     allocated at the place pointed by the second argument.
  
!    Thers are 6 modifiers, each consumes 2 chars.
     The octal form of a character code consumes
     (1 + CHARACTERBITS / 3 + 1) chars (including backslash at the head).
     We need one more byte for string terminator `\0'.  */
--- 1426,1432 ----
     All callers should assure that at least this size of memory is
     allocated at the place pointed by the second argument.
  
!    There are 6 modifiers, each consumes 2 chars.
     The octal form of a character code consumes
     (1 + CHARACTERBITS / 3 + 1) chars (including backslash at the head).
     We need one more byte for string terminator `\0'.  */