Update to opus-HEAD-66611f1.

silk/sum_sqr_shift.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:
 - Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
 - Redistributions in binary form must reproduce the above copyright
 notice, this list of conditions and the following disclaimer in the
 documentation and/or other materials provided with the distribution.
@@ skipping 35 matching lines @@
     nrg  = 0;
     shft = 0;
     len--;
     for( i = 0; i < len; i += 2 ) {
         nrg = silk_SMLABB_ovflw( nrg, x[ i ], x[ i ] );
         nrg = silk_SMLABB_ovflw( nrg, x[ i + 1 ], x[ i + 1 ] );
         if( nrg < 0 ) {
             /* Scale down */
             nrg = (opus_int32)silk_RSHIFT_uint( (opus_uint32)nrg, 2 );
             shft = 2;
+            i+=2;
             break;
         }
     }
     for( ; i < len; i += 2 ) {
         nrg_tmp = silk_SMULBB( x[ i ], x[ i ] );
         nrg_tmp = silk_SMLABB_ovflw( nrg_tmp, x[ i + 1 ], x[ i + 1 ] );
         nrg = (opus_int32)silk_ADD_RSHIFT_uint( nrg, (opus_uint32)nrg_tmp, shft );
         if( nrg < 0 ) {
             /* Scale down */
             nrg = (opus_int32)silk_RSHIFT_uint( (opus_uint32)nrg, 2 );
@@ skipping 10 matching lines @@
     if( nrg & 0xC0000000 ) {
         nrg = silk_RSHIFT_uint( (opus_uint32)nrg, 2 );
         shft += 2;
     }
 
     /* Output arguments */
     *shift  = shft;
     *energy = nrg;
 }