Fix RandomAccessFileAppender code typo causing compilation failure.
diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/RandomAccessFileAppender.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/RandomAccessFileAppender.java
index 87fcccd..ff7f06d 100644
--- a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/RandomAccessFileAppender.java
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/RandomAccessFileAppender.java
@@ -59,7 +59,7 @@
         private String advertiseURI;
 
         public Builder() {
-            this.withBufferSize(RandomAccessFileManager.DEFAULT_BUFFER_SIZE);
+            setBufferSize(RandomAccessFileManager.DEFAULT_BUFFER_SIZE);
         }
 
         @Override