Porting working changes from 3D-seq to 3D-MPI

PoissonSolver/2D-seq/src/main.c

@@ -26,7 +26,7 @@ enum VARIANT { SOR = 1, RB, RBA };
 
 int main(int argc, char** argv)
 {
-    int variant = RB;
+    int variant = SOR;
     double startTime, endTime;
     Parameter params;
     Solver solver;

PoissonSolver/2D-seq/src/solver.h

@@ -7,6 +7,8 @@
 #ifndef __SOLVER_H_
 #define __SOLVER_H_
 #include "parameter.h"
+#include "timing.h"
+
 
 typedef struct {
     double dx, dy;