df.from_records should be consistent in handling empty `data` arg

[y-p]

carried over from #3487

DataFrame.from_records([], columns=['a','b','c'])

Empty DataFrame
Columns: [a, b, c]
Index: []

vs.

DataFrame.from_records([], columns=['a','b','b'])

AssertionError: Number of manager items must equal union of block items

[jreback]

yep....I think its a failure in the dup columns....will take a look

[jreback]

easy

[jreback]

closed by #3564