drop useless field bIsDebug

Its last usage was gone with d82fc206c5d27191bc47adc486cf32442908f62d.

Change-Id: Ia891dd860edc305689804d02d4c74aa41804e484
Reviewed-on: https://gerrit.libreoffice.org/15911
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/starmath/inc/node.hxx b/starmath/inc/node.hxx
index 89620a4..9b0045b 100644
--- a/starmath/inc/node.hxx
+++ b/starmath/inc/node.hxx
@@ -100,9 +100,7 @@ class SmNode : public SmRect
    RectHorAlign    eRectHorAlign;
    sal_uInt16          nFlags,
                    nAttributes;
    bool            bIsPhantom,
                    bIsDebug;

    bool            bIsPhantom;
    bool            bIsSelected;

protected:
@@ -132,7 +130,6 @@ public:
            sal_uInt16 &    Flags() { return nFlags; }
            sal_uInt16 &    Attributes() { return nAttributes; }

            bool IsDebug() const { return bIsDebug; }
            bool IsPhantom() const { return bIsPhantom; }
            void SetPhantom(bool bIsPhantom);
            void SetColor(const Color &rColor);
@@ -152,10 +149,6 @@ public:

    sal_uInt16 FindIndex() const;

#if OSL_DEBUG_LEVEL
            void ToggleDebug() const;
#endif

    void         SetRectHorAlign(RectHorAlign eHorAlign, bool bApplyToSubTree = true );
    RectHorAlign GetRectHorAlign() const { return eRectHorAlign; }

diff --git a/starmath/source/node.cxx b/starmath/source/node.cxx
index 311df24..bfe66dc 100644
--- a/starmath/source/node.cxx
+++ b/starmath/source/node.cxx
@@ -46,7 +46,6 @@ SmNode::SmNode(SmNodeType eNodeType, const SmToken &rNodeToken)
    , nFlags( 0 )
    , nAttributes( 0 )
    , bIsPhantom( false )
    , bIsDebug( false )
    , bIsSelected( false )
    , nAccIndex( -1 )
    , aParentNode( NULL )
@@ -256,11 +255,6 @@ void SmNode::PrepareAttributes()

void SmNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell)
{
#if OSL_DEBUG_LEVEL > 1
    bIsDebug    = true;
#else
    bIsDebug    = false;
#endif
    bIsPhantom  = false;
    nFlags      = 0;
    nAttributes = 0;
@@ -300,23 +294,6 @@ sal_uInt16 SmNode::FindIndex() const
}


#if OSL_DEBUG_LEVEL > 1
void  SmNode::ToggleDebug() const
    // toggle 'bIsDebug' in current subtree
{
    SmNode *pThis = (SmNode *) this;

    pThis->bIsDebug = bIsDebug ? false : true;

    SmNode *pNode;
    sal_uInt16      nSize = GetNumSubNodes();
    for (sal_uInt16 i = 0; i < nSize; i++)
        if (NULL != (pNode = pThis->GetSubNode(i)))
            pNode->ToggleDebug();
}
#endif


void SmNode::Move(const Point& rPosition)
{
    if (rPosition.X() == 0  &&  rPosition.Y() == 0)