NSV: use VP30 instead of VP31.

This will not change anything, since this is the same codec in FFmpeg, but seeing that VP30 is way more used than VP31, the codec display will be more oftenly accurate.

modules/demux/nsv.c

@@ -474,7 +474,7 @@ static int ReadNSVs( demux_t *p_demux )
         case VLC_FOURCC( 'V', 'P', '3', ' ' ):
         case VLC_FOURCC( 'V', 'P', '3', '0' ):
         case VLC_FOURCC( 'V', 'P', '3', '1' ):
-            fcc = VLC_FOURCC( 'V', 'P', '3', '1' );
+            fcc = VLC_FOURCC( 'V', 'P', '3', '0' );
             break;
         case VLC_FOURCC( 'V', 'P', '5', ' ' ):
         case VLC_FOURCC( 'V', 'P', '5', '0' ):