Prevent reentance of styling which could occur when a styler added a fold point and this caused a search for subordinate lines which then tried to style further.
Prevent reentance of styling which could occur when a styler added a fold
point and this caused a search for subordinate lines which then tried to
style further.

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