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Minimum period is now 15

--- a/libcelt/celt.c

+++ b/libcelt/celt.c

@@ -61,7 +61,7 @@

 static const unsigned char tapset_icdf[3]={2,1,0};

 #define COMBFILTER_MAXPERIOD 1024

-#define COMBFILTER_MINPERIOD 16

+#define COMBFILTER_MINPERIOD 15

 /** Encoder state 

  @brief Encoder state

--- a/libcelt/pitch.c

+++ b/libcelt/pitch.c

@@ -253,7 +253,9 @@

    celt_word32 xcorr[3];

    celt_word32 best_xy, best_yy;

    int offset;

+   int minperiod0;

+   minperiod0 = minperiod;

    maxperiod /= 2;

    minperiod /= 2;

    *_T0 /= 2;

@@ -364,8 +366,8 @@

       pg = g;

    *_T0 = 2*T+offset;

-   if (*_T0<2*minperiod)

-      *_T0=2*minperiod;

+   if (*_T0<minperiod0)

+      *_T0=minperiod0;

    return pg;

 }