BUGFIX introduced in 4cf0f055b418544e9f6090728466d9f70c04ca07 and merged the 7 april.

That commit removed copy in Elemwise.perform(), but numpy.real return a view. This is bad if the op isn't inplace!
Merge pull request #1808 from nouiz/bugfix_real

BUGFIX introduced in 4cf0f055b418544e9f6090728466d9f70c04ca07 and merged...