Fix from John Ehresman to be safe when calling AutoCompleteGetCurrent when no autocompletion is active.
Fix from John Ehresman to be safe when calling AutoCompleteGetCurrent when
no autocompletion is active.

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