pgsql-server: Prevent install error message when doing cmp on empty
Log Message:
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Prevent install error message when doing cmp on empty tree.
Modified Files:
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pgsql-server/src/include:
Makefile (r1.13 -> r1.14)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/Makefile.diff?r1=1.13&r2=1.14)