osal lgtm warning

[avan989]

Describe the bug
Reference issue #320.

os-impl-bsd-sockets.c

line 217, 568:
if (addrlen == 0 \|\| addrlen > OS_SOCKADDR_MAX_LEN)
--
  | Comparison is always false because addrlen <= 28.

line 574:
Accessor->sockaddr.sa_family = sa_family;
--
  | The variable sa_family may not be initialized here.

shared/osapi-idmap.c

line 529:
return_code = OS_ObjectIdMap(idtype, idvalue, &obj->active_id);
--
  | The variable obj may not be initialized here.

line: 545
*array_index = local_id;
--
  | The variable local_id may not be initialized here.

line 549:
*record = obj;
--
  | The variable obj may not be initialized here.

shared/osapi-sockets.c

return_code = OS_SocketAccept_Impl(local_id, conn_id, Addr, timeout);
--
  | The variable conn_id may not be initialized here.

shared/osapi-time.c

line 466:
OS_ObjectIdRefcountDecr(timebase);
--
  | The variable timebase may not be initialized here.

os-posix.h

This header file should contain a header guard to prevent multiple inclusion.

Reporter Info
Anh Van, NASA Goddard.