Update manga list header

app/src/main/java/org/koitharu/kotatsu/utils/ext/OtherExt.kt

@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.utils.ext
+
+import android.icu.lang.UCharacter.GraphemeClusterBreak.T
+
+@Suppress("UNCHECKED_CAST")
+fun <T> Class<T>.castOrNull(obj: Any?): T? {
+	if (obj == null || !isInstance(obj)) {
+		return null
+	}
+	return obj as T
+}