[pgpool-committers: 8013] pgpool: Fix for bug-731: Fails to execute follow_primary_command..

[Muhammad Usama]

Fix for bug-731: Fails to execute follow_primary_command..

It was a segmentation fault happening because of a silly coding mistake in
parse_wd_exec_cluster_command_json() function.
The problem was the WDExecCommandArg** arg for returning the argument list
was not getting populated properly.
As part of the fix, to get rid of complexity and confusion, I have changed
the function signature to accept List* type argument for returning the
parsed command args instead of an array and its length.

Thanks to Bo Peng, Emond Papegaaij and Tatsuo Ishi for reviewing
and testing the fix

Branch
------
V4_2_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=3e8807f49af665e66da404c632e4a17819e826ec

Modified Files
--------------
src/include/watchdog/wd_internal_commands.h |  4 +--
src/include/watchdog/wd_json_data.h         |  7 ++--
src/pcp_con/pcp_worker.c                    | 18 ++++++----
src/watchdog/watchdog.c                     | 55 +++++++++++++++--------------
src/watchdog/wd_internal_commands.c         | 17 +++++----
src/watchdog/wd_json_data.c                 | 54 +++++++++++++++++-----------
6 files changed, 88 insertions(+), 67 deletions(-)