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.

timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla,timonwong/foo_uie_wsh_panel_mod.scintilla