(mail_send): Bugfix. Removed free(p) and prevent from later segmentation

fault.

 /* GNU Mailutils -- a suite of utilities for electronic mail
-   Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
 
    GNU Mailutils is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -189,10 +189,7 @@ mail_send (int argc, char **argv)
 		}
 	    }
 	  else
-	    {
-	      compose_header_set (&env, MU_HEADER_TO, p, COMPOSE_SINGLE_LINE);
-	      free (p);
-	    }
+	    compose_header_set (&env, MU_HEADER_TO, p, COMPOSE_SINGLE_LINE);
 	}
     }