make two small changes that prevented clang compiler from building --…

… Eigen::Dynamic and a missed override in ActiveBand

src/bands/active_bandstructure.h

@@ -163,7 +163,7 @@ class ActiveBandStructure : public BaseBandStructure {
    * (as in the phel scattering, where the window is set relative
    * to the maximum phonon energies)
   */
-  double getMaxEnergy();
+  double getMaxEnergy() override;
 
   /** Returns the group velocity of a quasiparticle from its Bloch index.
    * Used for accessing the band structure in the BTE.

src/bte/el_scattering.cpp

@@ -191,7 +191,7 @@ void ElScatteringMatrix::builder(VectorBTE *linewidth,
       Kokkos::Profiling::pushRegion("preprocessing loop");
       // do prep work for all values of q1 in current batch,
       // store stuff needed for couplings later
-#pragma omp parallel for default(none) shared(allNb3, allEigenVectors3, allV3s, allBose3Data, ik2Indexes, pointHelper, allQ3C, allStates3Energies, batch_size, start, allK2C, allState2Energies, allV2s, allEigenVectors2, k1C, allPolarData)
+#pragma omp parallel for default(none) shared(allNb3, allEigenVectors3, allV3s, allBose3Data, ik2Indexes, pointHelper, allQ3C, allStates3Energies, batch_size, start, allK2C, allState2Energies, allV2s, allEigenVectors2, k1C, allPolarData, Eigen::Dynamic)
       for (int ik2Batch = 0; ik2Batch < batch_size; ik2Batch++) {
         int ik2 = ik2Indexes[start + ik2Batch];
         WavevectorIndex ik2Idx(ik2);