fix empty search query bug
fix empty search query bug

SandroHc/nyaa,SpamNeko/nyaa,SandroHc/nyaa,SandroHc/nyaa,SpamNeko/nyaa,sisimouto/nyaa,sisimouto/nyaa,sisimouto/nyaa,sfan5/nyaa,SpamNeko/nyaa,SpamNeko/nyaa,tomleb/nyaa,SandroHc/nyaa,sisimouto/nyaa,tomleb/nyaa,sfan5/nyaa,sfan5/nyaa,tomleb/nyaa,tomleb/nyaa,sfan5/nyaa