Simplify name_buffer initialization

* src/names.c (name_init): Remove no-longer-needed initialization
of name_buffer, name_buffer_length.  It was confusing anyway,
since it caused name_buffer_length to not equal the length of
name_buffer.

src/names.c

@@ -874,8 +874,6 @@ static idx_t name_buffer_length; /* allocated length of name_buffer */
 void
 name_init (void)
 {
-  name_buffer = xmalloc (NAME_FIELD_SIZE + 2);
-  name_buffer_length = NAME_FIELD_SIZE;
   name_list_adjust ();
 }