telx: Correct a character mapping for Czech/Slovak teletext.

Signed-off-by: Derk-Jan Hartman <hartman@videolan.org>
(cherry picked from commit c3637a5e)

modules/codec/telx.c

@@ -131,7 +131,7 @@ static const uint16_t ppi_national_subsets[][20] =
     0x00e9, 0x00e4, 0x00f6, 0x00e5, 0x00fc }, /* swedish,finnish,hungarian ,010 */
 
   { 0x0023, 0x016f, 0x010d, 0x0165, 0x017e, 0x00fd, 0x00ed, 0x0159,
-    0x00e9, 0x00e1, 0x0115, 0x00fa, 0x0161 }, /* czech,slovak  ,011 */
+    0x00e9, 0x00e1, 0x011b, 0x00fa, 0x0161 }, /* czech,slovak  ,011 */
 
   { 0x0023, 0x0024, 0x00a7, 0x00c4, 0x00d6, 0x00dc, 0x005e, 0x005f,
     0x00b0, 0x00e4, 0x00f6, 0x00fc, 0x00df }, /* german ,100 */