fix compilation without avx

src/autopas/molecularDynamics/LJFunctorAVX.h

@@ -749,11 +749,14 @@ class LJFunctorAVX : public Functor<Particle, ParticleCell, typename Particle::S
   // make sure of the size of AoSThreadData
   static_assert(sizeof(AoSThreadData) % 64 == 0, "AoSThreadData has wrong size");
 
+#ifdef __AVX__
   const __m256d _zero{_mm256_set1_pd(0.)};
   const __m256d _one{_mm256_set1_pd(1.)};
   const __m256i _masks[3];
   const __m256i _ownedStateDummyMM256i{0x0};
   const __m256i _ownedStateOwnedMM256i{_mm256_set1_epi64x(static_cast<int64_t>(OwnershipState::owned))};
+#endif
+
   const __m256d _cutoffsquare;
   __m256d _shift6 = _mm256_setzero_pd();
   __m256d _epsilon24;
@@ -763,6 +766,7 @@ class LJFunctorAVX : public Functor<Particle, ParticleCell, typename Particle::S
 
   // sum of the potential energy, only calculated if calculateGlobals is true
   double _upotSum;
+
   // sum of the virial, only calculated if calculateGlobals is true
   std::array<double, 3> _virialSum;