pgsql: Add some assertions to view reloption macros

Add some assertions to view reloption macros

In these macros, the rd_options pointer is cast to ViewOption *.  Add
some assertions that the passed-in relation is actually a view before
doing that.

Author: Nikolay Shaplov <dhyan@nataraj.su>
Discussion: https://www.postgresql.org/message-id/flat/3634983.eHpMQ1mJnI@x200m

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/396773762425126a85243fc85a267d401496beb8

Modified Files
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src/include/utils/rel.h | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)