preproc: Fix the token in expanding the %+/%- macro-parameters
preproc: Fix the token in expanding the %+/%- macro-parameters

The code looked to be unintentionally always nullifying the
token pointer at first place in handling those macro-parameters.
Remove it to avoid segfault.

Fixes: de7acc3a46cb ("preproc: defer %00, %? and %??
expansion for nested macros, cleanups")

Reported-by: C. Masloch <33adfa7aa2bbcf32c58163f4aa6af99d90610803@ulukai.org>
Link: https://bugzilla.nasm.us/show_bug.cgi?id=3392640
Signed-off-by: Chang S. Bae <1d3f92548958be2d2740f7fde91f16f33389a300@intel.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm