(mu_true_answer_p): Ignore leading whitespace.

 /* GNU Mailutils -- a suite of utilities for electronic mail
-   Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2000, 2001, 2002, 2003,
+   2005 Free Software Foundation, Inc.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -1150,6 +1151,11 @@ mu_true_answer_p (const char *p)
   if (!p)
     return -1;
 
+  while (*p && isspace (*p))
+    p++;
+
+  if (*p)
+    {
       /* TRANSLATORS: This is a list of characters which start
 	 an affirmative answer. Whenever possible, please preserve
 	 'yY' in your translation, e.g., for Euskara:
@@ -1167,6 +1173,7 @@ mu_true_answer_p (const char *p)
       */
       else if (strchr (_("nN"), *p))
 	return 0;
+    }
   return -1;
 }