Fix CID 1325868 (#1 of 1): Dereference after null check (FORWARD_NULL):
Fix CID 1325869 (#1-2 of 2): Dereference after null check (FORWARD_NULL):
Here reqs can indeed be NULL. Added a check to
ompi_coll_base_free_reqs to prevent dereferencing NULL pointer.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>