Bugfix in handling of init/deadlock labels during constant processing - e.g. P=?[F "deadlock"&x=i] failed if i was a constant.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@4085 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/parser/visitor/GetAllUndefinedConstantsRecursively.java

@@ -72,6 +72,10 @@ public class GetAllUndefinedConstantsRecursively extends ASTTraverse
 	
 	public void visitPost(ExpressionLabel e) throws PrismLangException
 	{
+		// Ignore special cases of labels (no constants there)
+		if (e.getName().equals("deadlock") || e.getName().equals("init")) {
+			return;
+		}
 		// Look up this label in the label list
 		int i = labelList.getLabelIndex(e.getName());
 		if (i == -1)