[PyQt] pure virtual class and sip 4.13 vs 4.16

[claustre]

Dear you,

using sip 4.13 I was able to generate C++ binding  for a pure virtual 
class a and to compile but
using sip 4.16 the I got a different C++ binding code where some of the 
pure virtual functions were not
available in the generated C++ code.

Is there a a new directive  about pure virtual  class needed in sip 4.16?

What I try to compile is PyQt-3.18 and it fails with the code generated 
from sip/qt/qlayout.sip and the QLayout class.


Thanks in advance for your help.


Laurent