Improve code

app/src/main/java/net/pokeranalytics/android/ui/view/ContextMenuRecyclerView.kt

@@ -20,9 +20,11 @@ class ContextMenuRecyclerView : RecyclerView {
 	}
 
 	override fun showContextMenuForChild(originalView: View): Boolean {
+
 		val longPressPosition = getChildAdapterPosition(originalView)
-		if (longPressPosition >= 0) {
-			val longPressId = adapter!!.getItemId(longPressPosition)
+		val longPressId = adapter?.getItemId(longPressPosition)
+
+		if (longPressPosition >= 0 && longPressId != null) {
 			mContextMenuInfo = RecyclerViewContextMenuInfo(longPressPosition, longPressId)
 			return super.showContextMenuForChild(originalView)
 		}