Cppcheck warnings.

--HG--
branch : release

src/libs/vgeometry/varc_p.h

@@ -59,7 +59,7 @@ public:
     {}
 
     VArcData (const QString &formulaLength, const VPointF &center, qreal radius, const QString &formulaRadius, qreal f1,
-              QString formulaF1 )
+              const QString &formulaF1 )
         : f1(f1), formulaF1(formulaF1), f2(0), formulaF2("0"), radius(radius), formulaRadius(formulaRadius),
           center(center), isFlipped(false), formulaLength(formulaLength)
     {}

src/libs/vtools/tools/vabstracttool.cpp

@@ -299,7 +299,7 @@ void VAbstractTool::AddRecord(const quint32 id, const Tool &toolType, VAbstractP
     }
 
     quint32 cursor = doc->getCursor();
-    if (cursor <= 0)
+    if (cursor == 0)
     {
         history->append(record);
     }

src/libs/vtools/undocommands/addtocalc.cpp

@@ -94,7 +94,7 @@ void AddToCalc::redo()
     QDomElement calcElement;
     if (doc->GetActivNodeElement(VAbstractPattern::TagCalculation, calcElement))
     {
-        if (cursor <= 0)
+        if (cursor == 0)
         {
             calcElement.appendChild(xml);
         }