gaussian: remove += to make reconstruction possible

codes/gaussian/gaussian.c

@@ -103,7 +103,7 @@ void kernel_gaussian(int ni, int nj,
             B[i][j] = SCALAR_VAL(0.0);
             for(k = -KERNEL_SIZE_HALF; k < KERNEL_SIZE_HALF; k++) {
                 for(l = -KERNEL_SIZE_HALF; l < KERNEL_SIZE_HALF; l++) {
-                    B[i+k][j+l] += A[i+k][j+l] * C[KERNEL_SIZE_HALF+k][KERNEL_SIZE_HALF+l];
+                    B[i+k][j+l] = B[i+k][j+l] + A[i+k][j+l] * C[KERNEL_SIZE_HALF+k][KERNEL_SIZE_HALF+l];
                 }
             }
         }