fix bizarre win32 syntax error with eigen alignedbox

tests/bboxhelp.cc

@@ -0,0 +1,21 @@
+/* 
+   Work around bugs in MSVC compiler with Eigen AlignmentBox
+   bbox.min and bbox.max will fail with Syntax Errors if placed inside
+   of cgalpngtest.cc
+*/
+
+#include "linalg.h"
+
+Vector3d getBoundingCenter(BoundingBox bbox)
+{
+	Vector3d center = (bbox.min() + bbox.max()) / 2;
+	return center; // Vector3d(0,0,0);
+}
+
+double getBoundingRadius(BoundingBox bbox)
+{
+	double radius = (bbox.max() - bbox.min()).norm() / 2;
+	return radius; // 0;
+}
+
+