Fix ndarray contiguous type checking
Fix ndarray contiguous type checking

For instance, nd.array([[1]]) has C_CONTIGUOUS *and* F_CONTIGUOUS at
True. This is actually right because the memory representation is the
same with both conventions.

serge-sans-paille/pythran,pombredanne/pythran,serge-sans-paille/pythran,pombredanne/pythran,pombredanne/pythran