In ndn_KeyLocator, fix comment.
diff --git a/ndn-cpp/c/Key.h b/ndn-cpp/c/Key.h
index 1545a74..22ac0c4 100644
--- a/ndn-cpp/c/Key.h
+++ b/ndn-cpp/c/Key.h
@@ -17,7 +17,7 @@
} ndn_KeyLocatorType;
struct ndn_KeyLocator {
- ndn_KeyLocatorType type;
+ ndn_KeyLocatorType type; /**< -1 for none */
unsigned char *keyOrCertificate; /**< if type is ndn_KeyLocatorType_KEY, pointer to the pre-allocated buffer for the key value.
if type is ndn_KeyLocatorType_CERTIFICATE, pointer to the pre-allocated buffer for the cetrificate value. */
unsigned int keyOrCertificateLength;