Purge use of alloca()
Purge use of alloca()

svn path=/trunk/libcss/; revision=8715

zhuyadong/libcss,prepare/netsurf_libcss,zhuyadong/libcss,prepare/netsurf_libcss,servo/libcss,zhuyadong/libcss,servo/libcss,servo/libcss,prepare/netsurf_libcss