pgsql: Preserve errno across free().

Preserve errno across free().

Dept. of second thoughts: free() isn't guaranteed not to change errno.
Make sure we report the right error if getcwd() fails.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/2209c0f8618bbed257975055e017efab139e3fa3

Modified Files
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src/port/path.c | 3 +++
1 file changed, 3 insertions(+)

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