commit [edccc6] perhaps breaks caca term build

[Tatsuro M. <tma...@ya...>]

In file included from ../../gnuplot-gnuplot-main/src/term.h:227:0,
                 from ../../gnuplot-gnuplot-main/src/term.c:1189:
../../gnuplot-gnuplot-main/term/caca.trm: In function 'CACA_init_display':
../../gnuplot-gnuplot-main/term/caca.trm:771:23: error: 'current_locale' undeclared (first use in this function); did you mean 'surface_lscale'?
    setlocale(LC_TIME, current_locale != NULL ? current_locale : "C");
                       ^~~~~~~~~~~~~~
                       surface_lscale
../../gnuplot-gnuplot-main/term/caca.trm:771:23: note: each undeclared identifier is reported only once for each function it appears in
make[4]: *** [Makefile:910: term.o] Error 1


Tatsuro