in void calculate_edge_displacement, 1)corrected in/out comment 2)rem…

…oved a pair of redundant {}'s

sw/airborne/modules/computer_vision/lib/vision/edge_flow.c

@@ -159,7 +159,7 @@ void calculate_edge_histogram(struct image_t *img, int32_t edge_histogram[],
  * Calculate_displacement calculates the displacement between two histograms
  * @param[in] *edge_histogram  The edge histogram from the current frame_step
  * @param[in] *edge_histogram_prev  The edge histogram from the previous frame_step
- * @param[in] *displacement array with pixel displacement of the sequential edge histograms
+ * @param[out] *displacement array with pixel displacement of the sequential edge histograms
  * @param[in] size  Indicating the size of the displacement array
  * @param[in] window Indicating the search window size
  * @param[in] disp_range  Indicating the maximum disparity range for the block matching
@@ -196,7 +196,6 @@ void calculate_edge_displacement(int32_t *edge_histogram, int32_t *edge_histogra
   if (border[0] >= border[1] || abs(der_shift) >= 10) {
     SHIFT_TOO_FAR = 1;
   }
-  {
     // TODO: replace with arm offset subtract
     for (x = border[0]; x < border[1]; x++) {
       displacement[x] = 0;
@@ -211,8 +210,6 @@ void calculate_edge_displacement(int32_t *edge_histogram, int32_t *edge_histogra
       } else {
       }
     }
-  }
-
 }
 
 /**