Fix uninitialized value, naming

src/core/channel/channel_stack.c

@@ -220,6 +220,7 @@ void grpc_call_element_send_metadata(grpc_call_element *cur_elem,
   metadata_op.dir = GRPC_CALL_DOWN;
   metadata_op.done_cb = do_nothing;
   metadata_op.user_data = NULL;
+  metadata_op.flags = 0;
   metadata_op.data.metadata = mdelem;
   grpc_call_next_op(cur_elem, &metadata_op);
 }
@@ -230,14 +231,16 @@ void grpc_call_element_send_cancel(grpc_call_element *cur_elem) {
   cancel_op.dir = GRPC_CALL_DOWN;
   cancel_op.done_cb = do_nothing;
   cancel_op.user_data = NULL;
+  cancel_op.flags = 0;
   grpc_call_next_op(cur_elem, &cancel_op);
 }
 
 void grpc_call_element_send_finish(grpc_call_element *cur_elem) {
-  grpc_call_op cancel_op;
-  cancel_op.type = GRPC_SEND_FINISH;
-  cancel_op.dir = GRPC_CALL_DOWN;
-  cancel_op.done_cb = do_nothing;
-  cancel_op.user_data = NULL;
-  grpc_call_next_op(cur_elem, &cancel_op);
+  grpc_call_op finish_op;
+  finish_op.type = GRPC_SEND_FINISH;
+  finish_op.dir = GRPC_CALL_DOWN;
+  finish_op.done_cb = do_nothing;
+  finish_op.user_data = NULL;
+  finish_op.flags = 0;
+  grpc_call_next_op(cur_elem, &finish_op);
 }