fixes #755 - corrected error introduced due to corrected ExpressionDeParser.

Author: wumpz

src/main/java/net/sf/jsqlparser/util/deparser/ExpressionDeParser.java

@@ -410,6 +410,7 @@ public void visit(Function function) {
             buffer.append("()");
         } else {
             boolean oldUseBracketsInExprList = useBracketsInExprList;
+            useBracketsInExprList = true;
             if (function.isDistinct()) {
                 useBracketsInExprList = false;
                 buffer.append("(DISTINCT ");

src/test/java/net/sf/jsqlparser/statement/select/SpecialOracleTest.java

@@ -39,7 +39,7 @@ public class SpecialOracleTest {
     private static final File SQLS_DIR = new File("target/test-classes/net/sf/jsqlparser/statement/oracle-tests");
     private static final Logger LOG = Logger.getLogger(SpecialOracleTest.class.getName());
 
-    private List<String> successes = Arrays.asList("aggregate01.sql",
+    private final List<String> successes = Arrays.asList("aggregate01.sql",
             "analytic_query06.sql",
             "analytic_query08.sql",
             "analytic_query09.sql",