put only histref in the partial

Author: douglasdavis

src/dask_histogram/core.py

@@ -1026,9 +1026,17 @@ def _partitioned_histogram(
     # Single awkward array object.
     if len(data) == 1 and data_is_dak:
         from dask_awkward.lib.core import partitionwise_layer as dak_pwl
+        f = partial(_blocked_dak, histref=histref)
 
-        f = partial(_blocked_dak, weights=weights, sample=sample, histref=histref)
-        g = dak_pwl(f, name, data[0])
+        x = data[0]
+        if weights is not None and sample is not None:
+            g = dak_pwl(f, name, x, weights, sample)
+        elif weights is not None and sample is None:
+            g = dak_pwl(f, name, x, weights, None)
+        elif weights is None and sample is not None:
+            g = dak_pwl(f,  name, x, None, sample)
+        else:
+            g = dak_pwl(f, name, x, None, None)
 
     # Single object, not a dataframe
     elif len(data) == 1 and not data_is_df: