Make sure C math constants are set before using them

  - cmath/math.h constants are sometimes not set if _USE_MATH_DEFINES is
    not set before including cmath/math.h.

  - Make sure the define comes at the top of the file so that the header
    is not included indirectly (by other headers) without the define.

OMEdit/OMEditLIB/Animation/ExtraShapes.cpp

@@ -32,6 +32,11 @@
  * @author Volker Waurich <volker.waurich@tu-dresden.de>
  */
 
+#ifndef _USE_MATH_DEFINES
+  #define _USE_MATH_DEFINES
+#endif
+#include <cmath>
+
 #include "ExtraShapes.h"
 #include <iostream>