Add a missing const_cast

Author: Nicolas Cornu

coreneuron/utils/offload.hpp

@@ -63,7 +63,7 @@ template <typename T>
 void cnrn_target_delete(T* h_ptr, std::size_t len = 1) {
 #if defined(CORENEURON_ENABLE_GPU) && !defined(CORENEURON_PREFER_OPENMP_OFFLOAD) && \
     defined(_OPENACC)
-    acc_delete(h_ptr, len * sizeof(T));
+    acc_delete(const_cast<T*>(h_ptr), len * sizeof(T));
 #elif defined(CORENEURON_ENABLE_GPU) && defined(CORENEURON_PREFER_OPENMP_OFFLOAD) && \
     defined(_OPENMP)
     nrn_pragma_omp(target exit data map(delete : h_ptr[:len]))