[patch] fix another End keypress lockup in the viewer

[Roland Illig]

Jindrich Makovicka wrote:
> Hello,
> 
> the new viewer has a problem with viewing files with DOS line
> separators, which manifests again in a lockup after pressing the End
> key. Then, it is impossible to move the view further, except by pressing
> the Home key.

I have corrected the view_ccache_lookup() function so that it does not 
store an entry in the cache when the previous character is a '\r'. Can 
you please check if this fixes the bug? I still cannot reproduce it. :(

Roland