Only create VS6 bugfix routine if we are running VS6 and actually use it, this is to prevent an annoying warning about unused code

Signed-off-by: Augustin Cavalier <[email protected]>

src/libs/agg/src/agg_curves.cpp

@@ -252,8 +252,10 @@ namespace agg
         return m_scale;
     }
 
+#if defined(_MSC_VER) && _MSC_VER <= 1200
     //------------------------------------------------------------------------
     static double MSC60_fix_ICE(double v) { return v; }
+#endif
 
     //------------------------------------------------------------------------
     void curve4_inc::init(double x1, double y1,