[mpich romio 83bbb82] romio GPFS: missing initialization

> Pulled in from mpich romio, branch "main".
> Their commit message is below.
>
> This is part of a batch of commits from the
> following set of PRs:
>  *  pmodels/mpich#4943
>     -- darray fix which contains a flatten fix
>         73a3eba
>         c4b5762
>  *  pmodels/mpich#4995
>     -- write strided fix
>         bbb5210
>  *  pmodels/mpich#5100
>     -- build fix for -Wpedantic
>         ad0e435
>  *  pmodels/mpich#5099
>     -- build fix, they had let file-system=...gpfs bit rot
>         e1d42af
>         313289a
>         83bbb82
>  *  pmodels/mpich#5150
>     -- build fix, configure-related _GNU_SOURCE
>         a712b56
>         5a036e7
>  *  pmodels/mpich#5184
>     -- build fix, continuation of _GNU_SOURCE fix
>         d97c4ee

Romio GPFS had a runtime problem due to a .mem_ptrs field that
was uninitialized that it was potentially trying to free.

Signed-off-by: Mark Allen <markalle@us.ibm.com>

Author: markalle

3rd-party/romio341/adio/ad_gpfs/ad_gpfs_aggrs.c

@@ -705,6 +705,7 @@ void ADIOI_GPFS_Calc_others_req(ADIO_File fd, int count_my_req_procs,
         } else {
             others_req[i].count = 0;
             others_req[i].offsets = NULL;
+            others_req[i].mem_ptrs = NULL;
             others_req[i].lens = NULL;
         }
     }