Make internal func anon

fixes #489
diff --git a/include/json/config.h b/include/json/config.h
index 606cc85..085bdc0 100644
--- a/include/json/config.h
+++ b/include/json/config.h
@@ -80,7 +80,7 @@
 // In c++11 the override keyword allows you to explicity define that a function
 // is intended to override the base-class version.  This makes the code more
 // managable and fixes a set of common hard-to-find bugs.
-#if __cplusplus >= 201103L 
+#if __cplusplus >= 201103L
 # define JSONCPP_OVERRIDE override
 #elif defined(_MSC_VER) && _MSC_VER > 1600
 # define JSONCPP_OVERRIDE override