Forgot to move startFastWrite to public

for use in wireless audio sketch, needed to move startWrite() to a
public function

Author: TMRh20

RF24.h

@@ -66,22 +66,6 @@ class RF24
    */
   /**@{*/
 
-  /**
-   * Non-blocking write to the open writing pipe used for buffered writes
-   *
-   * @note Optimization: This function now leaves the CE pin high, so the radio
-   * will remain in TX or STANDBY-II Mode until a txStandBy() command is issued.
-   * This allows the chip to be used to its full potential in TX mode.
-   *
-   * @see writeFast()
-   * @see writeBlocking()
-   *
-   * @param buf Pointer to the data to be sent
-   * @param len Number of bytes to be sent
-   * @return True if the payload was delivered successfully false if not
-   */
-  void startFastWrite( const void* buf, uint8_t len );
-
   /**
    * Set chip select pin
    *
@@ -395,6 +379,22 @@ class RF24
   bool txStandBy();
   bool txStandBy(bool block);
 
+  /**
+   * Non-blocking write to the open writing pipe used for buffered writes
+   *
+   * @note Optimization: This function now leaves the CE pin high, so the radio
+   * will remain in TX or STANDBY-II Mode until a txStandBy() command is issued.
+   * This allows the chip to be used to its full potential in TX mode.
+   *
+   * @see writeFast()
+   * @see writeBlocking()
+   *
+   * @param buf Pointer to the data to be sent
+   * @param len Number of bytes to be sent
+   * @return True if the payload was delivered successfully false if not
+   */
+  void startFastWrite( const void* buf, uint8_t len );
+
   /**
    * Test whether there are bytes available to be read
    *