[lazarus] Notebook page removal

[Micha Nelissen]

Hi,

Please take a look at TNBPages.Remove in customnotebook.inc. 
NewPageIndex is the new page to select. If it is the same as the one to 
remove it selects one to the left or right. After that the 'Index' page 
gets removed. However, at the end it selects NewPageIndex-1 if 
NewPageIndex>=Index, why? It already caused a page different from the 
removed page to be selected, why bother another selection?

This line, 132, is causing errors when destroying the component, trying 
to select pages that don't exist.

Regards,

Micha.