top: tweak cmd/cmdline logic for a possible bad locale

Since this master library isn't quite as sophisticated
as the newlib version, this patch will protect against
the possibility of multibyte characters in a program's
name combined with some locale without UTF-8 encoding.

[ it is better to treat the COMMAND column length as ]
[ more than what's actually printed than to have the ]
[ line overflow & corrupt the remaining screen lines ]

Signed-off-by: Jim Warner <james.warner@comcast.net>

top/top.c

@@ -6191,7 +6191,10 @@ static const char *task_show (const WIN_t *q, const int idx) {
             varUTF8(p->cgroup[0]);
             break;
          case EU_CMD:
-            varUTF8(forest_display(q, p));
+            if (CHKw(q, Show_CMDLIN))
+               varUTF8(forest_display(q, p))
+            else
+               makeVAR(forest_display(q, p));
             break;
          case EU_COD:
             cp = scale_mem(S, pages2K(p->trs), W, Jn);