Undo accidental part of last commit.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@5278 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/simulator/Updater.java

@@ -323,14 +323,7 @@ public class Updater
 		if (modelType.choicesSumToOne() && Math.abs(sum - 1) > prism.getSumRoundOff()) {
 			throw new PrismLangException("Probabilities sum to " + sum + " in state " + state.toString(modulesFile), ups);
 		}
-		// Check if empty (e.g. due to all 0 probs/rates)
-		// Currently, PRISM treats this as an error
-		if (ch.size() == 0) {
-			String msg = modelType.probabilityOrRate();
-			msg += (ups.getNumUpdates() > 1) ? " values sum to " : " is ";
-			msg += "zero for update in state " + state.toString(modulesFile);
-			//throw new PrismLangException(msg, ups);
-		}
+
 		return ch;
 	}