Merge pull request #724 from ctiller/auth_leak

Fix memory leak

src/core/security/auth.c

@@ -234,6 +234,9 @@ static void destroy_call_elem(grpc_call_element *elem) {
   if (calld->host != NULL) {
     grpc_mdstr_unref(calld->host);
   }
+  if (calld->method != NULL) {
+    grpc_mdstr_unref(calld->method);
+  }
 }
 
 /* Constructor for channel_data */
@@ -276,6 +279,9 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
   if (channeld->error_msg_key != NULL) {
     grpc_mdstr_unref(channeld->error_msg_key);
   }
+  if (channeld->path_string != NULL) {
+    grpc_mdstr_unref(channeld->path_string);
+  }
 }
 
 const grpc_channel_filter grpc_client_auth_filter = {