Avoid UB in ploaduSegment

Eigen/src/Core/GenericPacketMath.h

@@ -1566,6 +1566,7 @@ EIGEN_DEVICE_FUNC inline Packet ploaduSegment(const typename unpacket_traits<Pac
   constexpr Index PacketSize = unpacket_traits<Packet>::size;
   eigen_assert((begin >= 0 && count >= 0 && begin + count <= PacketSize) && "invalid range");
   Scalar aux[PacketSize];
+  memset(static_cast<void*>(aux), 0x00, sizeof(Scalar) * PacketSize);
   smart_copy(from + begin, from + begin + count, aux + begin);
   return ploadu<Packet>(aux);
 }