fix: pick window is shown when no windows to hint

Author: s1n7ax

lua/window-picker/pickers/window-picker.lua

@@ -46,6 +46,14 @@ end
 function M:pick_window()
 	local windows = self:_get_windows()
 
+	if #windows == 0 then
+		vim.notify(
+			'No windows left to pick after filtering',
+			vim.log.levels.WARN
+		)
+		return
+	end
+
 	if self.autoselect_one and #windows == 1 then
 		return windows[1]
 	end