[YuriGarden] Small fixes

src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/yurigarden/YuriGardenParser.kt

@@ -88,10 +88,9 @@ internal abstract class YuriGardenParser(
 				append(filter.query.urlEncoded())
 			}
 
-			if (filter.states.isNotEmpty()) {
+			filter.states.oneOrThrowIfMany()?.let { state ->
-				filter.states.oneOrThrowIfMany()?.let {
 				append("&status=")
-					append(when (it) {
+				append(when (state) {
 					MangaState.ONGOING -> "ongoing"
 					MangaState.FINISHED -> "completed"
 					MangaState.PAUSED -> "hiatus"
@@ -99,7 +98,6 @@ internal abstract class YuriGardenParser(
 					else -> "all"
 				})
 			}
-			}
 
             		append("&full=true")