Fixing prevent major defects in security-server.

Fixing prevent major defects in security-server.
In file src/client/security-server-cient.c:
  Major "Integer overflowed argument" in function recv_exec_path_response()
In file src/server/security-server-main.c:
  Major "Integer overflowed argument" in function security_server_thread()
  Major "Various" in security_server_thread()
In file src/communication/sercurity-server-comm.c:
  Major "Integer overflowed argument" in function recv_pid_privilege_request()

[Issue#]        SSDWSSP-306
[Bug/Feature]   Fix prevent defects
[Cause]         Prevent server signalizes defects
[Solution]      N/A
[Verification]  Running tests and checking prevent output.

Change-Id: Iff331cd34c2f3447df79118cfa449e6c37c72091