fixes size of buffer to write

cpp/particles/interpolation/abstract_particle_set.hpp

@@ -245,7 +245,7 @@ class abstract_particle_set
                     0,
                     field_to_sample->comm,
                     pdata.get(),
-                    this->getLocalNumberOfParticles(),
+                    this->getLocalNumberOfParticles()*ncomp(fc),
                     file_id,
                     species_name + std::string("/") + field_name + std::string("/") + std::to_string(iteration));
             H5Fclose(file_id);