remove all trailing blank lines

by running this command:
git ls-files -z | xargs -0 perl -pi -0777 -e 's/\n\n+$/\n/'
This is in preparation for a more strict make syntax-check
rule that will detect trailing blank lines.

python/libvirt_wrap.h

@@ -185,4 +185,3 @@ PyObject * libvirt_virNodeDevicePtrWrap(virNodeDevicePtr node);
   if (PyEval_ThreadsInitialized())			       \
     PyGILState_Release(_save);				       \
   } LIBVIRT_STMT_END
-