Re-sync scan_perform.c.txt after changes to the cython code

As before, I would suggest reviewing just the cython code and not the C code since is generated, and hence hard to impossible to review.

Re-sync scan_perform.c.txt after changes to the cython code
9b3c1bfe · Razvan Pascanu · f03830f8 · 9b3c1bfe
--- a/theano/scan_module/scan_perform.c.txt
+++ b/theano/scan_module/scan_perform.c.txt