8263984: Invalidate printServices when there are no printers

Reviewed-by: serb, jdv

src/java.desktop/windows/classes/sun/print/PrintServiceLookupProvider.java

@@ -116,6 +116,7 @@ private synchronized void refreshServices() {
         if (printers == null) {
             // In Windows it is safe to assume no default if printers == null so we
             // don't get the default.
+            invalidateServices();
             printServices = new PrintService[0];
             return;
         }
@@ -146,16 +147,21 @@ private synchronized void refreshServices() {
             }
         }
 
+        invalidateServices();
+        printServices = newServices;
+    }
+
+    private void invalidateServices() {
         // Look for deleted services and invalidate these
         if (printServices != null) {
             for (int j=0; j < printServices.length; j++) {
                 if ((printServices[j] instanceof Win32PrintService) &&
                     (!printServices[j].equals(defaultPrintService))) {
+
                     ((Win32PrintService)printServices[j]).invalidateService();
                 }
             }
         }
-        printServices = newServices;
     }