[PyQt] Crash in sip_api_is_py_method() with PyQt 4.6

[Victor Stinner]

Hi,

I'm using Debian Sid, and my program crash since the last upgrade. The last 
upgrade installed PyQt 4.6 with SIP 4.9.

The crash is in sip_api_is_py_method(): if cls is not a PyTypeObject*, the 
dict value is a pointer to something is the memory, but not to a 
PyDictObject*. Attached patch fixes the crash.

But the new PyQt/SIP introduces a regression: I replaced contextMenu and 
mousePressEvent for some objects, and it doesn't work anymore. I don't know if 
this issue (sip_api_is_py_method() crash) is related.

-- 
Victor Stinner
http://www.haypocalc.com/
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