Wrap grid in all 3 dimensions.

DIY's decomposer should probably have generated an error when
initialized with only 1 entry but 3 dimensions. Or it should
broadcast the single value to all dimensions (but it doesn't
because the behavior changes with 3 values).

miniapps/oscillators/oscillator.cpp

@@ -324,7 +324,7 @@ int main(int argc, char** argv)
 
 
     diy::RegularDecomposer<Bounds>::BoolVector share_face;
-    diy::RegularDecomposer<Bounds>::BoolVector wrap(true);
+    diy::RegularDecomposer<Bounds>::BoolVector wrap(3, true);
     diy::RegularDecomposer<Bounds>::CoordinateVector ghosts = {ghostLevels, ghostLevels, ghostLevels};
 
     // decompose the domain