Patch from John Ehresman to make page level layout caching handle the caret line properly as a distinct entry.
Patch from John Ehresman to make page level layout caching handle the caret
line properly as a distinct entry.

rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror