Fix a Scan test. It is normal both scan got merged.

Fix test

Fix scan debugmode

Fix scan debugmode

destroy_map is not always defined for a scan op.

Fix tests

Looks ok to me.

Pycuda init

This is probably due to wrong handling of context. I think theano and
pycuda don't use the same context while the should. I am investigating
the problem, but while this make the buildbot segfault, I disable it
for now.

Update to sparse sandbox

better error msg.

Mixed