openpyxl.drawing.graphicGroupTransform2D fails on instantiate
*Created originally on Bitbucket by [jusdino (Justin Frahm)](https://bitbucket.org/%7B0cdb477a-976c-402e-8bb9-1bbccc8e3c54%7D/)* Instantiating a GroupTransform2D results in an exception: from openpyxl.drawing.graphic import GroupTransform2D gt = GroupTransform2D() Python 3.6 stack trace: Traceback (most recent call last): File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/descriptors/base.py", line 57, in _convert value = expected_type(value) TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<input>", line 1, in <module> File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/drawing/graphic.py", line 53, in __init__ self.rot = rot File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/descriptors/base.py", line 69, in __set__ value = _convert(self.expected_type, value) File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/descriptors/base.py", line 59, in _convert raise TypeError('expected ' + str(expected_type)) TypeError: expected <class 'int'> Python 2.7 stack trace: Traceback (most recent call last): File "<input>", line 1, in <module> File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/drawing/graphic.py", line 53, in __init__ self.rot = rot File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/descriptors/base.py", line 69, in __set__ value = _convert(self.expected_type, value) File "/home/jusdino/ownCloud/Documents/eclipse/openpyxl/openpyxl/descriptors/base.py", line 59, in _convert raise TypeError('expected ' + str(expected_type)) TypeError: expected <type 'long'> This happens when using 2.5, 2.6, and Default branches. *Attachments:* [dct_clean.xlsm](/uploads/73004d35dffefa74c47c6fb91789d299/dct_clean.xlsm)
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