tccgen.c: off by one in flexible array members
tccgen.c: off by one in flexible array members

tccgen.c: fix fexible array member breaking struct alignment

andreiw/tinycc,mingodad/tinycc,code4game/tinycc,run4flat/tinycc,mirror/tinycc,seyko2/tinycc,metaeducation/tcc,avih/tinycc,metaeducation/tcc,mingodad/tinycc,avih/tinycc,mirror/tinycc,code4game/tinycc,avih/tinycc,run4flat/tinycc,seyko2/tinycc,metaeducation/tcc,avih/tinycc,mirror/tinycc,metaeducation/tcc,mingodad/tinycc,run4flat/tinycc,run4flat/tinycc,seyko2/tinycc,mingodad/tinycc,seyko2/tinycc,metaeducation/tcc,seyko2/tinycc,andreiw/tinycc,code4game/tinycc,run4flat/tinycc,mirror/tinycc,andreiw/tinycc