Fix compile error

flatpak/src/installation.rs

+use crate::auto::Installation;
 use glib::object::IsA;
 use glib::translate::*;
-use crate::auto::Installation;
 use std::ptr;
 
 pub trait InstallationExtManual: 'static {
@@ -32,10 +32,10 @@ impl<O: IsA<Installation>> InstallationExtManual for O {
                 &mut error,
             );
             if from_glib(ret) {
-                Ok(out_changed)
+                Ok(from_glib(out_changed as glib::ffi::gboolean))
             } else {
                 Err(from_glib_full(error))
             }
         }
     }
-}
\ No newline at end of file
+}

flatpak/src/lib.rs

@@ -23,4 +23,4 @@ pub use auto::*;
 
 pub mod prelude;
 
-pub mod installation;
\ No newline at end of file
+pub mod installation;

flatpak/src/prelude.rs

 pub use crate::auto::traits::*;
-pub use crate::installation::InstallationExtManual;
\ No newline at end of file
+pub use crate::installation::InstallationExtManual;