Added a missing switch to stencil_assembly.sas.

acc/mhd_solver/stencil_assembly.sas

@@ -1,4 +1,7 @@
 
+#define LUPWD (0)
+
+
 Preprocessed Scalar
 value(in Scalar vertex)
 {
@@ -13,6 +16,8 @@ gradient(in Scalar vertex)
                     derz(vertexIdx, vertex)};
 }
 
+#if LUPWD
+
 Preprocessed Scalar
 der6x_upwd(in Scalar vertex) 
 {
@@ -49,6 +54,8 @@ der6z_upwd(in Scalar vertex)
                     +       vertex[vertexIdx.x, vertexIdx.y, vertexIdx.z+3] + vertex[vertexIdx.x, vertexIdx.y, vertexIdx.z-3])};
 }
 
+#endif
+
 Preprocessed Matrix
 hessian(in Scalar vertex)
 {

acc/mhd_solver/stencil_process.sps

@@ -3,7 +3,7 @@
 #define LTEMPERATURE (0)
 #define LGRAVITY (0)
 #define LFORCING (1)
-#define LUPWD (1)
+#define LUPWD (0)
 
 
 // Declare uniforms (i.e. device constants)