e-object-check - this has been turned off since 2007 - back on

e-object-check - this has been turned off since 2007 - back on

this is crazy. all the E_OBJECT_CHECK macros have been off since 2007.
this is just nuts. either remove them, or have them on by default, but
not off. so this turns them back on and fixes code to actually compile
again with them on, as this broke over the years. a lot of code
expects/assumes thatthese willcheck types and null ptrs, but they
don't because they are off by default.