[qca-nss-clients] Fix KW issues in DTLS Manager

- Fix for KW issue id 865509.
- Updated if condition so that pointer will not be
  dereferenced if it is NULL.

Change-Id: Ic9ab145be3a16d71ed5cdfbe193d81fb079f9c0c
Signed-off-by: Tushar Mathur <tushar@codeaurora.org>
1 file changed