8020208: NullPointerException at sun.print.Win32PrintService.getMediaPrintables

Reviewed-by: jchen, prr

src/windows/classes/sun/print/Win32PrintService.java

@@ -445,7 +445,7 @@ public class Win32PrintService implements PrintService, AttributeUpdater,
 
         initMedia();
 
-        if ((mediaSizeNames == null) && (mediaSizeNames.length == 0)) {
+        if ((mediaSizeNames == null) || (mediaSizeNames.length == 0)) {
             return null;
         }