[PyQt] Attribute 'swap' is missing - e.g. QIcon

[Michael Hartung]

Hi,

After switching to 4.9.4 I can use 'swap' e.g. with QIcon on MacOSX:

self.__majorQIcon.swap(QtGui.QIcon(iconPath))

Before this attribute was not available on MacOSX and on Linux whereas 
it works on Windows all the time.

Updating to 4.9.4 did not help on Linux.

An explanation would be nice...

Thanks in advance!
Michael