Create new datatype when saving CartesianPoint to HDF5 using LegendHDF5IO

test/test_io.jl

@@ -69,7 +69,7 @@ end
         detno = Int32[1],
         thit = VectorOfVectors([T[0] * u"s"]),
         edep = VectorOfVectors([T[1] * u"eV"]),
-        pos = VectorOfVectors([[SVector{3, T}.(0.01, 0.01, 0.01) * u"m"]])
+        pos = VectorOfVectors([[SVector{3, T}.(0.01, 0.01, 0.01)]])
     )
 
     contact_charge_signals = timed_simulate_waveforms(      
@@ -111,4 +111,4 @@ end
         end
         rm("generated_waveforms_evts_1-1.h5")
     end
-end
+end