Merge pull request #30 from GenerationSoftware/gen-347-macro-issue-q-…

…7-set-drawmanager-parameter-in-prizepool

Set drawManager only if not zero

src/PrizePool.sol

@@ -263,8 +263,8 @@ contract PrizePool is TieredLiquidityDistributor {
     _lastClosedDrawStartedAt = params.firstDrawStartsAt;
     firstDrawStartsAt = params.firstDrawStartsAt;
 
-    drawManager = params.drawManager;
     if (params.drawManager != address(0)) {
+      drawManager = params.drawManager;
       emit DrawManagerSet(params.drawManager);
     }
   }