echo off-by-1 error when POSIXLY_CORRECT and no args

[Paul Eggert]

I installed the following patch to fix a bug I introduced a few months
ago; sorry about that.

2004-09-19  Paul Eggert  <address@hidden>

        * src/echo.c (main): Don't pass NULL to strcmp when
        POSIXLY_CORRECT and given no arguments.

Index: echo.c
===================================================================
RCS file: /home/eggert/coreutils/cu/src/echo.c,v
retrieving revision 1.55
retrieving revision 1.56
diff -p -u -r1.55 -r1.56
--- echo.c      1 Jun 2004 12:43:41 -0000       1.55
+++ echo.c      20 Sep 2004 06:32:10 -0000      1.56
@@ -120,7 +120,7 @@ main (int argc, char **argv)
   bool display_return = true;
   bool allow_options =
     (! getenv ("POSIXLY_CORRECT")
-     || (! DEFAULT_ECHO_TO_XPG && 0 < argc && STREQ (argv[1], "-n")));
+     || (! DEFAULT_ECHO_TO_XPG && 1 < argc && STREQ (argv[1], "-n")));
 
   /* System V machines already have a /bin/sh with a v9 behavior.
      Use the identical behavior for these machines so that the