Add missing set_icon_from_buffer to Application

src/api/linux/mod.rs

@@ -171,6 +171,10 @@ impl Window {
         panic!("Not implemented on this platform!");
     }
 
+    pub fn set_icon_from_buffer(&self, _: &[u8], _: u32, _: u32) -> Result<(), SystrayError> {
+        unimplemented!()
+    }
+
     pub fn quit(&self) {
         glib::idle_add(|| {
             gtk::main_quit();

src/lib.rs

@@ -110,6 +110,12 @@ impl Application {
         self.window.set_icon_from_resource(resource)
     }
 
+    pub fn set_icon_from_buffer(&mut self, buffer: &[u8], width: u32, height: u32)
+        -> Result<(), SystrayError>
+    {
+        self.window.set_icon_from_buffer(buffer, width, height)
+    }
+
     pub fn shutdown(&self) -> Result<(), SystrayError> {
         self.window.shutdown()
     }