do not make string, if there is no cho, jung, jongseong in hangul_buffer_get_jamo_string()
do not make string, if there is no cho, jung, jongseong
in hangul_buffer_get_jamo_string()


git-svn-id: 7310062a41377f21bc0fe4a55434538a6bf916be@16 8f00fcd2-89fc-0310-932e-b01be5b65e01

cherojeong/libhangul,rkJun/libhangul,cherojeong/libhangul,Sinseiki/libhangul,Sinseiki/libhangul,studioego/libhangul,libhangul/libhangul,libhangul/libhangul,cherojeong/libhangul,choehwanjin/libhangul,rkJun/libhangul,libhangul/libhangul,3beol/libhangul,choehwanjin/libhangul,3beol/libhangul,libhangul/libhangul,rkJun/libhangul,rkJun/libhangul,studioego/libhangul,choehwanjin/libhangul,3beol/libhangul,Sinseiki/libhangul,Sinseiki/libhangul,studioego/libhangul,cherojeong/libhangul,3beol/libhangul,studioego/libhangul,3beol/libhangul,soomtong/libhangul,rkJun/libhangul,soomtong/libhangul,choehwanjin/libhangul,soomtong/libhangul,soomtong/libhangul,soomtong/libhangul,Sinseiki/libhangul