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vmx(1): fix virtio network bloomfilter

--- a/sys/src/cmd/vmx/virtio.c

+++ b/sys/src/cmd/vmx/virtio.c

@@ -423,7 +423,7 @@

 			return (d->net.flags & VNETNOUNI) == 0;

 		if(memcmp(mac, d->net.mac, 6) == 0) return 1;

 		if(d->net.macbloom == 0) return 0;

-		return d->net.macbloom & 1ULL<<bloomhash(mac);

+		return d->net.macbloom >> bloomhash(mac) & 1;

 	}else if(memcmp(mac, bcast, 6) == 0)

 		return (d->net.flags & VNETNOBCAST) == 0;

 	else{

@@ -430,7 +430,7 @@

 		if((d->net.flags & (VNETNOMULTI|VNETALLMULTI)) != 0)

 			return (d->net.flags & VNETNOMULTI) == 0;

 		if(d->net.multibloom == 0) return 0;

-		return d->net.multibloom & 1ULL<<bloomhash(mac);

+		return d->net.multibloom >> bloomhash(mac) & 1;

 	}

 }