[mpich romio 313289a] romio gpfs: avoid freeing NULL

> 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

Configuring mpich with --with-file-system=nfs+ufs+gpfs it wouldn't
run because there are a couple free() calls that reported null
pointers, so I changed a couple places to "if (x) { ADIOI_Free(x); }"

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

Author: markalle

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

@@ -425,8 +425,12 @@ void ADIOI_GPFS_ReadStridedColl(ADIO_File fd, void *buf, int count,
     GPFSMPIO_T_CIO_REPORT(0, fd, myrank, nprocs);
 
     /* free all memory allocated for collective I/O */
-    ADIOI_Free(others_req[0].offsets);
-    ADIOI_Free(others_req[0].mem_ptrs);
+    if (others_req[0].offsets) {
+        ADIOI_Free(others_req[0].offsets);
+    }
+    if (others_req[0].mem_ptrs) {
+        ADIOI_Free(others_req[0].mem_ptrs);
+    }
     ADIOI_Free(others_req);
 
     ADIOI_Free(buf_idx);

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

@@ -447,8 +447,12 @@ void ADIOI_GPFS_WriteStridedColl(ADIO_File fd, const void *buf, int count,
     GPFSMPIO_T_CIO_REPORT(1, fd, myrank, nprocs);
 
     /* free all memory allocated for collective I/O */
-    ADIOI_Free(others_req[0].offsets);
-    ADIOI_Free(others_req[0].mem_ptrs);
+    if (others_req[0].offsets) {
+        ADIOI_Free(others_req[0].offsets);
+    }
+    if (others_req[0].mem_ptrs) {
+        ADIOI_Free(others_req[0].mem_ptrs);
+    }
     ADIOI_Free(others_req);
 
     ADIOI_Free(buf_idx);