Simplify filling virtual space and avoid any side effects that may be caused by calling AddCharUTF.
Simplify filling virtual space and avoid any side effects that may be caused by
calling AddCharUTF.

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