[commit] Fix "show prompt"

[Daniel Jacobowitz <drow@false.org>]

One of the gcc4 warnings patches incorrectly converted the var_string
case; it's a char **, not a char *.  Committed as obvious, fixes two
testcases on i686-pc-linux-gnu.

-- 
Daniel Jacobowitz
CodeSourcery, LLC

2005-05-28  Daniel Jacobowitz  <dan@codesourcery.com>

	* cli/cli-setshow.c (do_setshow_command): Partially revert previous
	change.  Cast to "char **" for var_string.

Index: cli/cli-setshow.c
===================================================================
RCS file: /cvs/src/src/gdb/cli/cli-setshow.c,v
retrieving revision 1.25
diff -u -p -r1.25 cli-setshow.c
--- cli/cli-setshow.c	26 May 2005 20:49:03 -0000	1.25
+++ cli/cli-setshow.c	28 May 2005 18:16:21 -0000
@@ -301,8 +301,8 @@ do_setshow_command (char *arg, int from_
       switch (c->var_type)
 	{
 	case var_string:
-	  if (((char *)c->var)[0] != '\0')
-	    fputstr_filtered ((char *)c->var, '"', stb->stream);
+	  if (*(char **) c->var)
+	    fputstr_filtered (*(char **) c->var, '"', stb->stream);
 	  break;
 	case var_string_noescape:
 	case var_optional_filename: