Fixes this bug:

    Not all words in the line of a 'thesaurus' completion file are suggested
    when using 'thesaurus' completion, only the matched word and the words that
    follow after it.

    Example:
        1. Create a file with the line "angry furious mad enraged".
        2. Use it for 'thesaurus' completion, :set thesaurus=filename
        3. Type "fur<CTRL-X CTRL-T>"  (without letting go of CTRL)
        4. Only "furious", "mad" and "enraged" are suggested -- not "angry".

The solution is to start the 'thesaurus' word scan from the beginning of the
line.  Also, the matched word must be skipped in the scan, as it has been added
to the suggestion list earlier.

Created by Martin Toft <mt@martintoft.dk> during Google Summer of Code 2007.


Index: src/edit.c
===================================================================
*** src/edit.c	(revision 359)
--- src/edit.c	(working copy)
***************
*** 2842,2847 ****
--- 2842,2848 ----
  			/*
  			 * Add the other matches on the line
  			 */
+ 			ptr = buf;
  			while (!got_int)
  			{
  			    /* Find start of the next word.  Skip white
***************
*** 2851,2857 ****
  				break;
  			    wstart = ptr;
  
! 			    /* Find end of the word and add it. */
  #ifdef FEAT_MBYTE
  			    if (has_mbyte)
  				/* Japanese words may have characters in
--- 2852,2858 ----
  				break;
  			    wstart = ptr;
  
! 			    /* Find end of the word. */
  #ifdef FEAT_MBYTE
  			    if (has_mbyte)
  				/* Japanese words may have characters in
***************
*** 2868,2876 ****
  			    else
  #endif
  				ptr = find_word_end(ptr);
! 			    add_r = ins_compl_add_infercase(wstart,
! 				    (int)(ptr - wstart),
! 				    p_ic, files[i], *dir, 0);
  			}
  		    }
  		    if (add_r == OK)
--- 2869,2880 ----
  			    else
  #endif
  				ptr = find_word_end(ptr);
! 
! 			    /* Add the word. Skip the regexp match. */
! 			    if (wstart != regmatch->startp[0])
! 				add_r = ins_compl_add_infercase(wstart,
! 					(int)(ptr - wstart),
! 					p_ic, files[i], *dir, 0);
  			}
  		    }
  		    if (add_r == OK)