xmerge: The assigned value is never used

Change-Id: I0476332d43138f3403b85d7ce14f4e27376adc0c
Reviewed-on: https://gerrit.libreoffice.org/10688Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

xmerge/source/xmerge/java/org/openoffice/xmerge/converter/xml/OfficeDocument.java

@@ -1131,7 +1131,7 @@ public abstract class OfficeDocument
         BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
         StringBuffer buffer = new StringBuffer();
 
-        String str = null;
+        String str;
 
         while ((str = br.readLine()) != null) {
 
@@ -1198,7 +1198,7 @@ public abstract class OfficeDocument
         BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
         char[] charArray = new char[4096];
         StringBuffer sBuf = new StringBuffer();
-        int n = 0;
+        int n;
         while ((n=br.read(charArray, 0, charArray.length)) > 0)
             sBuf.append(charArray, 0, n);