fix build

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/plugin/callback_msg.rs

@@ -2,7 +2,11 @@ use super::cstr_to_string;
 use crate::flutter::{self, APP_TYPE_CM, APP_TYPE_MAIN, SESSIONS};
 use hbb_common::{lazy_static, log, message_proto::PluginRequest};
 use serde_json;
-use std::{collections::HashMap, ffi::c_char, sync::Arc};
+use std::{
+    collections::HashMap,
+    ffi::{c_char, c_void},
+    sync::Arc,
+};
 
 const MSG_TO_PEER_TARGET: &str = "peer";
 const MSG_TO_UI_TARGET: &str = "ui";
@@ -42,7 +46,7 @@ pub fn callback_msg(
     peer: *const c_char,
     target: *const c_char,
     id: *const c_char,
-    content: *const c_char,
+    content: *const c_void,
     len: usize,
 ) {
     macro_rules! callback_msg_field {
@@ -66,12 +70,12 @@ pub fn callback_msg(
                 let content_slice =
                     unsafe { std::slice::from_raw_parts(content as *const u8, len) };
                 let content_vec = Vec::from(content_slice);
-                let plugin = PluginRequest {
+                let request = PluginRequest {
                     id,
                     content: bytes::Bytes::from(content_vec),
                     ..Default::default()
                 };
-                session.send_plugin(plugin);
+                session.send_plugin_request(request);
             }
         }
         MSG_TO_UI_TARGET => {