imv-attestation: Avoid memory leak when skipping unsupported work items

src/libpts/plugins/imv_attestation/imv_attestation_agent.c

@@ -802,6 +802,7 @@ METHOD(imv_agent_if_t, solicit_recommendation, TNC_Result,
 						result_str = result_buf.ptr;
 						break;
 					default:
+						result->destroy(result);
 						continue;
 				}
 				session->remove_workitem(session, enumerator);