PDFBOX-5660: Sonar fix

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1934771 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/test/java/org/apache/pdfbox/printing/TestPDFPrintable.java

@@ -43,8 +43,8 @@
  */
 class TestPDFPrintable
 {
-    private final int IMAGE_WIDTH = 100;
-    private final int IMAGE_HEIGHT = 100;
+    private static final int IMAGE_WIDTH = 100;
+    private static final int IMAGE_HEIGHT = 100;
 
     /**
      * Tests that the page border is drawn with Color.GRAY when showPageBorder is true.