Fix qtfb rust demo

Author: asivery

examples/qtfb/rust/Cargo.toml

@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-qtfb-client = { path = "../../clients/rust" }
+qtfb-client = { path = "../../../backends/qtfb-clients/rust" }

examples/qtfb/rust/src/main.rs

@@ -3,7 +3,8 @@ use qtfb_client::ClientConnection;
 fn main() {
     let client = ClientConnection::new(
         qtfb_client::constants::DEFAULT_SCENE,
-        qtfb_client::constants::FBFMT_RMPP_RGB888
+        qtfb_client::constants::FBFMT_RMPP_RGB888,
+        None
     ).unwrap();
     let file_contents = std::fs::read("a.raw").unwrap();
     client.shm[0..file_contents.len()].copy_from_slice(&file_contents);