fix rewritable

assira.core/src/main/java/net/ranides/assira/reflection/util/ReflectUtils.java

@@ -52,7 +52,7 @@ public final class ReflectUtils {
     }
 
     public static Field rewritable(Field field) {
-        if(0 == (field.getModifiers() & ~Modifier.FINAL)) {
+        if(0 == (field.getModifiers() & Modifier.FINAL)) {
             return field;
         }
         try {