Value returned from a function is not checked for errors before being used

Defect 114077 (STATIC_C)
Checker CHECKED_RETURN (subcategory none)
File: /test/csuite/incr_backup/main.c
Function reopen_file
/test/csuite/incr_backup/main.c, line: 516
Calling "close" without checking return value (as is done elsewhere 7 out of 9 times).

            close(*fdp);