[patch] fixed buglet in ":history a"

[Dominique Pelle]

In ":help :history", I see...

  :his[tory] [{name}] [{first}][, [{last}]]
                List the contents of history {name} which can be:
                c[md]    or :   command-line history
                s[earch] or /   search string history
                e[xpr]   or =   expression register history
                i[nput]  or @   input line history
                d[ebug]  or >   debug command history
                a[ll]           all of the above

So according the the help file, ":history a" should behave
the same as ":history all". But if I type ":history a"
instead of ":history all", I get an error:

E488: Trailing characters

Attached patch fixes it.

-- Dominique

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Index: ex_getln.c
===================================================================
RCS file: /cvsroot/vim/vim7/src/ex_getln.c,v
retrieving revision 1.98
diff -c -r1.98 ex_getln.c
*** ex_getln.c	18 Mar 2009 11:52:47 -0000	1.98
--- ex_getln.c	11 Apr 2009 19:56:13 -0000
***************
*** 5686,5692 ****
  	histype1 = get_histtype(arg);
  	if (histype1 == -1)
  	{
! 	    if (STRICMP(arg, "all") == 0)
  	    {
  		histype1 = 0;
  		histype2 = HIST_COUNT-1;
--- 5686,5692 ----
  	histype1 = get_histtype(arg);
  	if (histype1 == -1)
  	{
! 	    if (STRNICMP(arg, "all", STRLEN(arg)) == 0)
  	    {
  		histype1 = 0;
  		histype2 = HIST_COUNT-1;