Fix incorrect method call which was causing unnecessary boxing & unboxing

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1333705 13f79535-47bb-0310-9956-ffa450edef68

Author: sebbASF

src/main/java/org/apache/commons/codec/digest/Sha2Crypt.java

@@ -139,7 +139,7 @@ private static String sha2Crypt(byte[] keyBytes, String salt, String saltPrefix,
             throw new IllegalArgumentException("Invalid salt value: " + salt);
         }
         if (m.group(3) != null) {
-            rounds = Integer.valueOf(m.group(3));
+            rounds = Integer.parseInt(m.group(3));
             rounds = Math.max(ROUNDS_MIN, Math.min(ROUNDS_MAX, rounds));
             roundsCustom = true;
         }