Hi, I clone the repo and tried to build as described on the README, but when I use make it stucks at 16% and show several errors:

[ 16%] Building CXX object src/lib_json/CMakeFiles/jsoncpp_lib_static.dir/json_reader.cpp.o
/home/jsoncpp/src/lib_json/json_reader.cpp: In member function 'void Json::Reader::readNumber()':
/home/jsoncpp/src/lib_json/json_reader.cpp:433:40: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:436:40: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:438:42: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:442:40: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:444:42: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:446:42: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp: In member function 'bool Json::OurReader::readNumber(bool)':
/home/jsoncpp/src/lib_json/json_reader.cpp:1397:40: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:1400:40: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:1402:42: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:1406:40: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:1408:42: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
/home/jsoncpp/src/lib_json/json_reader.cpp:1410:42: error: conversion to 'char' from 'int' may alter its value [-Werror=conversion]
cc1plus: some warnings being treated as errors
make[2]: *** [src/lib_json/CMakeFiles/jsoncpp_lib_static.dir/json_reader.cpp.o] Error 1
make[1]: *** [src/lib_json/CMakeFiles/jsoncpp_lib_static.dir/all] Error 2
make: *** [all] Error 2

Is there something that I could do to prevent the Warnings to be treated as Errors?