parse_line: Shrink code with memset helper
parse_line: Shrink code with memset helper

We know that P_none = 0 thus instead of using
for() statement assign them all in one memset
call.

Signed-off-by: Cyrill Gorcunov <7a1ea01eee6961eb1e372e3508c2670446d086f4@gmail.com>

techkey/nasm,techkey/nasm,Distrotech/nasm,Distrotech/nasm,techkey/nasm,projedi/nasm,techkey/nasm,projedi/nasm,projedi/nasm,projedi/nasm,techkey/nasm,Distrotech/nasm,projedi/nasm,Distrotech/nasm