TST: failing box plot tests on windows

[jreback]

These are failing on 34-64 and 33-32

======================================================================
ERROR: test_boxplot (pandas.tests.test_graphics.TestDataFrameGroupByPlots)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 2629, in test_boxplot
    self._check_axes_shape(axes.values(), axes_num=2, layout=(1, 2))
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 302, in _check_axes_shape
    visible_axes = self._flatten_visible(axes)
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 337, in _flatten_visible
    axes = [ax for ax in axes if ax.get_visible()]
TypeError: iteration over a 0-d array

======================================================================
ERROR: test_grouped_box_multiple_axes (pandas.tests.test_graphics.TestDataFrameGroupByPlots)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 2827, in test_grouped_box_multiple_axes
    self._check_axes_shape(returned, axes_num=3, layout=(1, 3))
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 302, in _check_axes_shape
    visible_axes = self._flatten_visible(axes)
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 337, in _flatten_visible
    axes = [ax for ax in axes if ax.get_visible()]
  File "c:\Users\Jeff Reback\Documents\GitHub\pandas\build\lib.win32-3.3\pandas\tests\test_graphics.py", line 337, in <listcomp>
    axes = [ax for ax in axes if ax.get_visible()]
AttributeError: 'ValuesView' object has no attribute 'get_visible'

----------------------------------------------------------------------
Ran 7627 tests in 1222.636s

FAILED (SKIP=368, errors=2)

C:\Users\Jeff Reback\Documents\GitHub\pandas>more versions.33-32.log

INSTALLED VERSIONS
------------------
commit: None
python: 3.3.3.final.0
python-bits: 32
OS: Windows
OS-release: 7
machine: AMD64
processor: Intel64 Family 6 Model 42 Stepping 7, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None

pandas: 0.12.0
nose: 1.3.0
Cython: 0.19.2
numpy: 1.8.0
scipy: 0.13.1
statsmodels: 0.5.0
IPython: 1.1.0
sphinx: None
patsy: 0.2.1
scikits.timeseries: None
dateutil: 2.2
pytz: 2013.8
bottleneck: 0.7.0
tables: 3.0.0
numexpr: 2.2.2
matplotlib: 1.3.1
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: None
httplib2: None
apiclient: None
rpy2: None
sqlalchemy: 0.9.3
pymysql: 0.6.1.None
psycopg2: 2.5.2 (dt dec pq3 ext)

[jreback]

could be related #7736

@TomAugspurger
cc @sinhrks