Fix a usage of PyInt_FromLong in multi_array_chunked.cxx.
Fix a usage of PyInt_FromLong in multi_array_chunked.cxx.

dstoe/vigra,funkey/vigra,dstoe/vigra,dagophil/vigra,dagophil/vigra,dstoe/vigra,dstoe/vigra,dagophil/vigra,dagophil/vigra,dagophil/vigra,dagophil/vigra,funkey/vigra,funkey/vigra,dstoe/vigra,dstoe/vigra,funkey/vigra,funkey/vigra,funkey/vigra,dagophil/vigra,dstoe/vigra,funkey/vigra