fixed build on windows when using qmake
fixed build on windows when using qmake

qlands/qjson,cbranch/qjson-qmakefriendly,drizt/qjson,drizt/qjson,flavio/qjson,seem-sky/qjson,coolshou/qjson,qlands/qjson,gentlefn/qjson,cbranch/qjson-qmakefriendly,seem-sky/qjson,flavio/qjson,coolshou/qjson,gentlefn/qjson