Switch iteration over channels to the do{}while(); construct in order to inform the compiler that the these loops execute at least once. (This results in more intelligent output from the clang static analysis tool and should also produce faster code on at least some architectures.)

libcelt/quant_bands.c

@@ -74,14 +74,13 @@ static int intra_decision(const celt_word16 *eBands, celt_word16 *oldEBands, int
 {
    int c, i;
    celt_word32 dist = 0;
-   for (c=0;c<C;c++)
-   {
+   c=0; do {
       for (i=start;i<end;i++)
       {
          celt_word16 d = SHR16(SUB16(eBands[i+c*len], oldEBands[i+c*len]),2);
          dist = MAC16_16(dist, d,d);
       }
-   }
+   } while (++c<C);
    return SHR32(dist,2*DB_SHIFT-4) > 2*C*(end-start);
 }