Fix to line layout cache use. When a line was retrieved from the line layout cache and then replaced with another that mapped to the same cache entry then there could be use of a deleted pointer.
Fix to line layout cache use. When a line was retrieved from
the line layout cache and then replaced with another that
mapped to the same cache entry then there could be use of
a deleted pointer.

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