march attack assault: Don't sweep with zero mobility

Require positive mobility for sweeping mines, just like ships do.
Screwed up when land units were added in Chainsaw 3.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

diff --git a/src/lib/subs/lndsub.c b/src/lib/subs/lndsub.c
index 0d49b0164e5eca691480be43d2ec99ef94217f42..7fcd9c4113b62f790b17f5fc66b56f2efa6deaa1 100644 (file)
--- a/src/lib/subs/lndsub.c
+++ b/src/lib/subs/lndsub.c
@@ -600,7 +600,7 @@ lnd_sweep(struct emp_qelem *land_list, int explicit, int takemob,
                    prland(&llp->unit.land));
            continue;
        }
-       if (takemob && llp->mobil < 0.0) {
+       if (takemob && llp->mobil <= 0.0) {
            if (explicit)
                lnd_stays(actor, "is out of mobility", llp);
            continue;