PDFBOX-5660: optimize, as suggested by Valery Bokov, closes #372

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1930520 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/color/PDDeviceN.java

@@ -122,9 +122,10 @@ private void initColorConversionCache(PDResources resources) throws IOException
 
         // process components
         colorantToComponent = new int[numColorants];
-        if (attributes.getProcess() != null)
+        PDDeviceNProcess process = attributes.getProcess();
+        if (process != null)
         {
-            List<String> components = attributes.getProcess().getComponents();
+            List<String> components = process.getComponents();
 
             // map each colorant name to the corresponding process component name (if any)
             for (int c = 0; c < numColorants; c++)
@@ -133,7 +134,7 @@ private void initColorConversionCache(PDResources resources) throws IOException
             }
 
             // process color space
-            processColorSpace = attributes.getProcess().getColorSpace();
+            processColorSpace = process.getColorSpace();
         }
         else
         {