QA-issues with sandbox-2.35

[gto2023]

# QA Notice: Package triggers severe warnings which indicate that it may exhibit random runtime failures.
#
# sys-apps/sandbox-2.35/work/sandbox-2.35/src/environ.c:211:19:
#    warning: the comparison will always evaluate as ‘true’ for the address of ‘work_dir’ will never be NULL [-Waddress]
# sys-apps/sandbox-2.35/work/sandbox-2.35/libsandbox/canonicalize.c:113:41: 
#    warning: passing argument 2 to 'restrict'-qualified parameter aliases with argument 1 [-Wrestrict]
# sys-apps/sandbox-2.35/work/sandbox-2.35/libsandbox/libsandbox.c:144:9: 
#    warning: passing argument 2 to 'restrict'-qualified parameter aliases with argument 1 [-Wrestrict]

[thesamesam]

Thanks. Fixed in #16 and #22.