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src: mark _dvdcss_titlekey static as it's never used outside of the unit

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

--- a/src/css.c

+++ b/src/css.c

@@ -87,6 +87,8 @@

 static int  AttackPadding   ( uint8_t const[], int, uint8_t * );

 #endif

+static int  _dvdcss_titlekey    ( dvdcss_t, int , dvd_key_t );

+

 /*****************************************************************************

  * _dvdcss_test: check if the disc is encrypted or not

  *****************************************************************************

@@ -406,7 +408,7 @@

 /*****************************************************************************

  * _dvdcss_titlekey: get title key.

  *****************************************************************************/

-int _dvdcss_titlekey( dvdcss_t dvdcss, int i_pos, dvd_key_t p_title_key )

+static int _dvdcss_titlekey( dvdcss_t dvdcss, int i_pos, dvd_key_t p_title_key )

 {

     static uint8_t p_garbage[ DVDCSS_BLOCK_SIZE ];  /* we never read it back */

     uint8_t p_key[ KEY_SIZE ];

--- a/src/css.h

+++ b/src/css.h

@@ -57,7 +57,6 @@

 int   _dvdcss_test        ( dvdcss_t );

 int   _dvdcss_title       ( dvdcss_t, int );

 int   _dvdcss_disckey     ( dvdcss_t );

-int   _dvdcss_titlekey    ( dvdcss_t, int , dvd_key_t );

 int   _dvdcss_unscramble  ( uint8_t *, uint8_t * );

 #endif /* DVDCSS_CSS_H */