Fixed a bug that made crash the solver for some constraints.

org.sat4j.csp/src/main/java/org/sat4j/csp/constraints3/CountingCtrBuilder.java

@@ -213,7 +213,7 @@ public class CountingCtrBuilder {
 	}
 
 	public boolean buildCtrNotAllEqual(String id, XVarInteger[] list) {
-		return buildCtrNValues(id, list, new StringCondition("ne(", ","+Integer.toString(list.length)+""));
+		return buildCtrNValues(id, list, new StringCondition("ne(", ","+Integer.toString(list.length)+")"));
 	}
 
 	public boolean buildCtrCardinality(String id, XVarInteger[] list, boolean closed, int[] values, XVarInteger[] occurs) {