fixup: stimes bug in worstCaseCapacity

Author: nfrisby

ouroboros-consensus/src/ouroboros-consensus/Ouroboros/Consensus/Mempool/API.hs

@@ -249,7 +249,7 @@ worstCaseCapacity ::
   => MempoolCapacity blk
   -> TxMeasure blk
 worstCaseCapacity capacity =
-    x
+    if mult < 1 then Measure.zero else x
   where
     MempoolCapacity {
         mcBlockCapacity     = cap