rtpdec_h264: Reorder code blocks

This removes one level of indentation.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/rtpdec_h264.c

@@ -137,7 +137,11 @@ static int sdp_parse_fmtp_config_h264(AVStream *stream,
                 uint8_t *dest = av_malloc(packet_size + sizeof(start_sequence) +
                                           codec->extradata_size +
                                           FF_INPUT_BUFFER_PADDING_SIZE);
-                if (dest) {
+                if (!dest) {
+                    av_log(codec, AV_LOG_ERROR,
+                           "Unable to allocate memory for extradata!");
+                    return AVERROR(ENOMEM);
+                }
                 if (codec->extradata_size) {
                     memcpy(dest, codec->extradata, codec->extradata_size);
                     av_free(codec->extradata);
@@ -152,11 +156,6 @@ static int sdp_parse_fmtp_config_h264(AVStream *stream,
 
                 codec->extradata       = dest;
                 codec->extradata_size += sizeof(start_sequence) + packet_size;
-                } else {
-                    av_log(codec, AV_LOG_ERROR,
-                           "Unable to allocate memory for extradata!");
-                    return AVERROR(ENOMEM);
-                }
             }
         }
         av_log(codec, AV_LOG_DEBUG, "Extradata set to %p (size: %d)!",