Fix loading charset overrides list

The dvb_charset_init() was not called anywhere.

src/input/mpegts/linuxdvb/linuxdvb.c

@@ -22,12 +22,16 @@
 #include "settings.h"
 #include "linuxdvb_private.h"
 #include "scanfile.h"
+#include "../dvb_charset.h"
 
 void linuxdvb_init ( int adapter_mask )
 {
   /* Load scan files */
   scanfile_init();
 
+  /* Load list of mux charset global overrides */
+  dvb_charset_init();
+
   /* Initialise networks */
   linuxdvb_network_init();