FIX: add back if condition checking for float64 (removed by accident)

kokkos/utility.py

@@ -99,6 +99,8 @@ def read_dtype(_dtype):
             return lib.uint64
         elif _dtype == np.float32:
             return lib.float32
+        elif _dtype == np.float64:
+            return lib.float64
         elif _dtype == np.complex64:
             return lib.complex_float32_dtype
         elif _dtype == np.complex128: