Fix locale for decimal points

resolves #514

src/lib_json/json_reader.cpp

@@ -1619,6 +1619,7 @@ bool OurReader::decodeDouble(Token& token, Value& decoded) {
     Char buffer[bufferSize + 1];
     memcpy(buffer, token.start_, ulength);
     buffer[length] = 0;
+    fixNumericLocaleInput(buffer, buffer + length);
     count = sscanf(buffer, format, &value);
   } else {
     JSONCPP_STRING buffer(token.start_, token.end_);