MONDRIAN: Fixes a test failure in PerformanceTest.testBugMondrian550.…

… If the cell limit was attained while in the middle of an evaluation in CrossJoinFunDef, the evaluator didn't get his restore point invoked between the passes. Now we always save/restore when evaluating and there is a risk to see the cell limit attained.

[git-p4: depot-paths = "//open/mondrian/": change = 15002]

src/main/mondrian/rolap/RolapResult.java

@@ -588,6 +588,7 @@ protected void loadMembers(
         evaluator.setCellReader(batchingReader);
         while (true) {
             axisMembers.clearAxisCount();
+            final int savepoint = evaluator.savepoint();
             try {
                 evalLoad(
                     nonAllMembers,
@@ -601,6 +602,8 @@ protected void loadMembers(
                 // Decrement count because it wasn't a recursive formula that
                 // caused the iteration.
                 --attempt;
+            } finally {
+                evaluator.restore(savepoint);
             }
 
             if (!phase()) {