message: core(merge): fix SIMD loop head processing
diff: @@ -36,13 +36,14 @@ vecmerge_( const T** src, T* dst, int len, int cn )
  const T* src0 = src[0];
  const T* src1 = src[1];
  + const int dstElemSize = cn * sizeof(T);
  int r = (int)((size_t)(void*)dst % (VECSZ*sizeof(T)));
  hal::StoreMode mode = hal::STORE_ALIGNED_NOCACHE;
  if( r != 0 )
  {
  mode = hal::STORE_UNALIGNED;
  - if( r % cn == 0 && len > VECSZ )
  - i0 = VECSZ - (r / cn);
  + if (r % dstElemSize == 0 && len > VECSZ)
  + i0 = VECSZ - (r / dstElemSize);
  }
  if( cn == 2 )
  