[PATCH] Add some useful asserts into View Options macroses

This thread is a follow up to the thread https://www.postgresql.org/message-id/2620882.s52SJui4ql@x200m where I've been
tryingto remove StdRdOptions 
 
structure and replace it with unique structure for each relation kind.

I've decided to split that patch into smaller parts.

This part adds some asserts to ViewOptions macroses.
Since an option pointer there is converted into (ViewOptions *) it would be 
really good to make sure that this macros is called in proper context, and we 
do the convertation properly. At least when running tests with asserts turned 
on.

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