not exporting qdt file

[qcad/qcad.git] / calcunits / QCalcUnit.h

diff --git a/calcunits/QCalcUnit.h b/calcunits/QCalcUnit.h
index f1853cf..7eec04a 100644 (file)
--- a/calcunits/QCalcUnit.h
+++ b/calcunits/QCalcUnit.h
@@ -32,6 +32,7 @@ protected :
 public:
     virtual void Calc(QBits *qBits) = 0;
     virtual std::string GetName(void) const = 0;
+    virtual ~QCalcUnit(void) = 0;
     static unsigned int insert0(unsigned int i0, unsigned int BitNum);
     static unsigned int insert1(unsigned int i0, unsigned int BitNum);
     static void swap(double &x,double &y) {