[pgpool-committers: 1625] pgpool: Fix to output error message when if_up_cmd fails.

[Yugo Nagata]

Fix to output error message when if_up_cmd fails.

This is suggested by Sergey Arlashin in [pgpool-general: 2457].
(including commit: 6d6afb6ebffa45d32f05288dd0ab2235a495c0ed)

Branch
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V3_3_STABLE

Details
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http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=8c065048a32fbcde04735add9db400b01d3d8710

Modified Files
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watchdog/wd_if.c     |   43 ++++++++++++++++++++++++++++++++++++++-----
watchdog/wd_packet.c |   23 ++++++++++++++++++-----
2 files changed, 56 insertions(+), 10 deletions(-)