Merge pull request open-mpi#7237 from mcoil1/pr/v4.0.x/wbailey2-fixes

v4.0.x/two fixes

Author: hppritcha

HACKING

@@ -246,4 +246,4 @@ have done little to try to remove those warnings.
 If you do not have Flex installed, it can be downloaded from the
 following URL:
 
-   http://flex.sourceforge.net/
+    https://github.com/westes/flex

ompi/mca/io/romio321/romio/adio/common/onesided_aggregation.c

@@ -1966,7 +1966,7 @@ printf("iAmUsedAgg - currentRoundFDStart initialized "
       int *sourceAggBlockLengths=NULL;
       MPI_Aint *sourceAggDisplacements=NULL, *recvBufferDisplacements=NULL;
       MPI_Datatype *sourceAggDataTypes=NULL;
-      char *derivedTypePackedSourceBuffer;
+      char *derivedTypePackedSourceBuffer=NULL;
       int derivedTypePackedSourceBufferOffset = 0;
       int allocatedDerivedTypeArrays = 0;
       ADIO_Offset amountOfDataReadThisRoundAgg = 0;