Allow initial states list to be cleared in ModelExplicit.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@10119 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/explicit/ModelExplicit.java

@@ -135,6 +135,14 @@ public abstract class ModelExplicit implements Model
 		initialStates.add(i);
 	}
 
+	/**
+	 * Empty the list of initial states.
+	 */
+	public void clearInitialStates()
+	{
+		initialStates.clear();
+	}
+
 	/**
 	 * Add a state to the list of deadlock states.
 	 */