Merge pull request #6731 from wangkx/h12705

HPCC-12705 Check before set measure in StatisticsFilter::setKind()

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>

system/jlib/jstats.cpp

@@ -1687,7 +1687,8 @@ void StatisticsFilter::setKind(const char * _kind)
 {
     if (!_kind || !*_kind || streq(_kind, "*"))
     {
-        measure = SMeasureAll;
+        if (measure == SMeasureNone)
+            measure = SMeasureAll;
         kind = StKindAll;
         return;
     }