hevc: reduce variable scope

Also, collapse the array into a scalar, since only one value is needed
at a time.

libavcodec/hevc.c

@@ -1648,7 +1648,6 @@ static void hls_prediction_unit(HEVCContext *s, int x0, int y0,
     int x_cb             = x0 >> log2_min_cb_size;
     int y_cb             = y0 >> log2_min_cb_size;
     int ref_idx[2];
-    int mvp_flag[2];
     int x_pu, y_pu;
     int i, j;
 
@@ -1667,6 +1666,8 @@ static void hls_prediction_unit(HEVCContext *s, int x0, int y0,
                                    partIdx, merge_idx, &current_mv);
     } else {
         enum InterPredIdc inter_pred_idc = PRED_L0;
+        int mvp_flag;
+
         ff_hevc_set_neighbour_available(s, x0, y0, nPbW, nPbH);
         if (s->sh.slice_type == B_SLICE)
             inter_pred_idc = ff_hevc_inter_pred_idc_decode(s, nPbW, nPbH);
@@ -1678,10 +1679,10 @@ static void hls_prediction_unit(HEVCContext *s, int x0, int y0,
             }
             current_mv.pred_flag[0] = 1;
             hls_mvd_coding(s, x0, y0, 0);
-            mvp_flag[0] = ff_hevc_mvp_lx_flag_decode(s);
+            mvp_flag = ff_hevc_mvp_lx_flag_decode(s);
             ff_hevc_luma_mv_mvp_mode(s, x0, y0, nPbW, nPbH, log2_cb_size,
                                      partIdx, merge_idx, &current_mv,
-                                     mvp_flag[0], 0);
+                                     mvp_flag, 0);
             current_mv.mv[0].x += lc->pu.mvd.x;
             current_mv.mv[0].y += lc->pu.mvd.y;
         }
@@ -1699,10 +1700,10 @@ static void hls_prediction_unit(HEVCContext *s, int x0, int y0,
             }
 
             current_mv.pred_flag[1] = 1;
-            mvp_flag[1] = ff_hevc_mvp_lx_flag_decode(s);
+            mvp_flag = ff_hevc_mvp_lx_flag_decode(s);
             ff_hevc_luma_mv_mvp_mode(s, x0, y0, nPbW, nPbH, log2_cb_size,
                                      partIdx, merge_idx, &current_mv,
-                                     mvp_flag[1], 1);
+                                     mvp_flag, 1);
             current_mv.mv[1].x += lc->pu.mvd.x;
             current_mv.mv[1].y += lc->pu.mvd.y;
         }