Fix handler ordering config (#560)

Author: kstvr32

src/main/java/codechicken/nei/ClientHandler.java

@@ -250,7 +250,7 @@ public static void loadHandlerOrdering() {
             } catch (IOException e) {}
         }, lines -> lines.map(line -> line.split(COMMA_DELIMITER)).filter(parts -> parts.length == 2).forEach(parts -> {
             String handlerId = parts[0];
-            int ordering = Integer.getInteger(parts[1], 0);
+            int ordering = Integer.parseInt(parts[1]);
             NEIClientConfig.handlerOrdering.put(handlerId, ordering);
         }));
     }