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mix_pitch_and_residual() no longer computing Ryp twice

--- a/libcelt/vq.c

+++ b/libcelt/vq.c

@@ -62,16 +62,9 @@

    for (i=0;i<N;i++)

       Rpp = MAC16_16(Rpp,P[i],P[i]);

-   Ryp = 0;

    for (i=0;i<N;i++)

-      Ryp = MAC16_16(Ryp,SHL16(iy[i],yshift),P[i]);

-

-   /* Remove part of the pitch component to compute the real residual from

-   the encoded (int) one */

-   for (i=0;i<N;i++)

       y[i] = SHL16(iy[i],yshift);

-

-   /* Recompute after the projection (I think it's right) */

+   

    Ryp = 0;

    for (i=0;i<N;i++)

       Ryp = MAC16_16(Ryp,y[i],P[i]);