Fix fractional-scale capture sizing and release idle capture caches

compositor/src/state.rs

@@ -440,6 +440,8 @@ pub struct Ferese {
     pub(crate) windows: WindowRegistry<Window>,
     pub(crate) render: crate::render::RenderResources,
     pub(crate) capture_render: crate::render::RenderResources,
+    pub(crate) capture_last_used: Option<Instant>,
+    pub(crate) nested_capture_texture: Option<smithay::backend::renderer::gles::GlesTexture>,
     pub(crate) capture_epoch: u64,
     capture_protected_windows: HashSet<WindowId>,
     capture_protected_cursor: Option<WlSurface>,
@@ -742,6 +744,8 @@ impl Ferese {
             windows: WindowRegistry::default(),
             render: Default::default(),
             capture_render: Default::default(),
+            capture_last_used: None,
+            nested_capture_texture: None,
             capture_epoch: 0,
             capture_protected_windows: HashSet::new(),
             capture_protected_cursor: None,