[COMMITTERS] pgsql: Properly document return value of strpos().

[Bruce Momjian]

Log Message:
-----------
Properly document return value of strpos().

Modified Files:
--------------
    pgsql/doc/src/sgml:
        func.sgml (r1.291 -> r1.292)
        
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml.diff?r1=1.291&r2=1.292)

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