Small stability improvement for HwndWrapper#WindowText(). This avoids exceptions of the form 	Traceback (most recent call last): 	  File "pywinauto\controls\HwndWrapper.pyc", line 262, in WindowText 	  File "pywinauto\handleprops.pyc", line 58, in text 	  File "ctypes\__init__.pyc", line 310, in create_unicode_buffer 	ValueError: Array length must be >= 0, not -5880895
Small stability improvement for HwndWrapper#WindowText(). This avoids exceptions of the form
	Traceback (most recent call last):
	  File "pywinauto\controls\HwndWrapper.pyc", line 262, in WindowText
	  File "pywinauto\handleprops.pyc", line 58, in text
	  File "ctypes\__init__.pyc", line 310, in create_unicode_buffer
	ValueError: Array length must be >= 0, not -5880895

coandco/pywinauto,coandco/pywinauto,coandco/pywinauto