PDFBOX-4892: optimize, as suggested by Valery Bokov

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1903451 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDPage.java b/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDPage.java
index a8aaaf0..ec2517c 100644
--- a/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDPage.java
+++ b/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDPage.java
@@ -311,11 +311,11 @@
             {
                 mediaBox = new PDRectangle((COSArray) base);
             }
-        }
-        if (mediaBox == null)
-        {
-            LOG.debug("Can't find MediaBox, will use U.S. Letter");
-            mediaBox = PDRectangle.LETTER;
+            else
+            {
+                LOG.debug("Can't find MediaBox, will use U.S. Letter");
+                mediaBox = PDRectangle.LETTER;
+            }
         }
         return mediaBox;
     }