throw exception when holder is not defined

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

@@ -29,6 +29,7 @@ interface BindableHolder {
 
 }
 
+
 enum class RowViewType {
 	HEADER,
 	HEADER_TITLE_VALUE,
@@ -281,7 +282,7 @@ enum class RowViewType {
 					parent,
 					false)
 			)
-			else -> FakeViewHolder(parent)
+			else -> throw Exception("Undefined RowViewType's holder")
 		}
 	}