Fixed sphere example.

demo/src/sphere.cc

@@ -37,7 +37,7 @@ int main(int argc, char* argv[])
   // ===== create projection =====
   WorldVector<double> ballCenter;
   ballCenter.set(0.0);
-  new BallProject(1, BOUNDARY_PROJECTION, ballCenter, 1.0);
+  new BallProject(1, VOLUME_PROJECTION, ballCenter, 1.0);
 
   // ===== create and init the scalar problem ===== 
   ProblemScal sphere("sphere");