Make FindColumn() return correct position when column falls inside tab width. Bug #3483713.
Make FindColumn() return correct position when column falls inside tab width. Bug #3483713.

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