fix compile problem

Author: cmlchen

Diff for: src/lib_json/json_value.cpp

@@ -854,7 +854,7 @@ bool Value::asBool() const {
     return value_.uint_ ? true : false;
   case realValue:
     // According to JavaScript language zero or NaN is regarded as false
-    return std::fpclassify(value_.real_) != FP_ZERO && std::fpclassify(value_.real_) != FP_NAN
+      return std::fpclassify(value_.real_) != FP_ZERO && std::fpclassify(value_.real_) != FP_NAN;
   default:
     break;
   }