silencing a wrong <Tab> message

[Benno Schulenberg]

Hi,

Since <Tab> now seeks through the entire document (as 
cursor-movement-scrolls is now On by default), it produces a 
mistaken error message when the current node does not contain any 
menu item or cross reference.  Do for example: info info, <]>, <]>, 
<Tab>.  It says "No cross references in this node." while it is 
already sitting at a menu item in a different node.

To silence this mistaken message, in info_move_to_xref() an
"if (!cursor_movement_scrolls_p)" could be added before
"info_error (msg_no_xref_node, NULL, NULL);"

Benno