[Opus] Update to v1.2.1

third_party/opus/src/silk/bwexpander.c

 /***********************************************************************
 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
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@@ skipping 27 matching lines @@
     opus_int32                  chirp_Q16           /* I    Chirp factor (typically in the range 0 to 1)                */
 )
 {
     opus_int   i;
     opus_int32 chirp_minus_one_Q16 = chirp_Q16 - 65536;
 
     /* NB: Dont use silk_SMULWB, instead of silk_RSHIFT_ROUND( silk_MUL(), 16 ), below.  */
     /* Bias in silk_SMULWB can lead to unstable filters                                */
     for( i = 0; i < d - 1; i++ ) {
         ar[ i ]    = (opus_int16)silk_RSHIFT_ROUND( silk_MUL( chirp_Q16, ar[ i ]             ), 16 );
-        chirp_Q16 +=            silk_RSHIFT_ROUND( silk_MUL( chirp_Q16, chirp_minus_one_Q16 ), 16 );
+        chirp_Q16 +=             silk_RSHIFT_ROUND( silk_MUL( chirp_Q16, chirp_minus_one_Q16 ), 16 );
     }
     ar[ d - 1 ] = (opus_int16)silk_RSHIFT_ROUND( silk_MUL( chirp_Q16, ar[ d - 1 ] ), 16 );
 }