avcodec/dynamic_hdr_vivid: fix base_enable_flag control

The base_enable_flag is parallel to three_Spline_enable_flag. The
typesetting of the specification is very misleading.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

libavcodec/dynamic_hdr_vivid.c

@@ -91,7 +91,7 @@ int ff_parse_itu_t_t35_to_dynamic_hdr_vivid(AVDynamicHDRVivid *s, const uint8_t
                         tm_params->base_param_k3 = get_bits(gb, 4);
                         tm_params->base_param_Delta_enable_mode = get_bits(gb, 3);
                         tm_params->base_param_Delta = (AVRational){get_bits(gb, 7), base_param_Delta_den};
-
+                    }
                         if (get_bits_left(gb) < 1)
                             return AVERROR_INVALIDDATA;
                         tm_params->three_Spline_enable_flag = get_bits(gb, 1);
@@ -130,7 +130,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
                         }
                 }
             }
-            }
 
             params->color_saturation_mapping_flag = get_bits(gb, 1);
             if (params->color_saturation_mapping_flag) {