pydata/pandas — pull request #6951 by sinhrks (2014-04-24 13:02:12+00:00)
Title: BUG: enabling subplots works unexpectedly

Found 2 minor issues related to plotting with `subplots=True`.

1. If `DataFrame` only has single column, plot raises `TypeError`. It is because `_subplots` returns `Axes` instance, not array.

2. If `kind=scatter` or `kind=hexbin` is specified with `subplots=True`, additional blank axes is drawn.