PDFBOX-5868: make field private

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1922891 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/text/PDFTextStripper.java

@@ -160,8 +160,8 @@ public class PDFTextStripper extends LegacyPDFStreamEngine
     // use a stack so we don't get confused if another BDC within "/ActualText... BDC" block
     private final Deque<PDMarkedContent> currentMarkedContents = new ArrayDeque<>();
     // to replace the unicode of the first TextPosition and empty the others
-    boolean firstActualTextPosition = false; 
-    String actualText = null;
+    private boolean firstActualTextPosition = false; 
+    private String actualText = null;
 
     /**
      * The charactersByArticle is used to extract text by article divisions. For example a PDF that has two columns like