libvlc: fix logic.

Backported from [f2287d10]

src/control/audio.c

@@ -475,7 +475,7 @@ void libvlc_audio_set_track( libvlc_media_player_t *p_mi, int i_track,
         return;
 
     var_Change( p_input_thread, "audio-es", VLC_VAR_GETCHOICES, &val_list, NULL );
-    if( (i_track < 0) && (i_track > val_list.p_list->i_count) )
+    if( (i_track < 0) || (i_track > val_list.p_list->i_count) )
     {
         libvlc_exception_raise( p_e, "Audio track out of range" );
         goto end;

src/control/video.c

@@ -476,7 +476,7 @@ void libvlc_video_set_spu( libvlc_media_player_t *p_mi, int i_spu,
         goto end;
     }
 
-    if( (i_spu < 0) && (i_spu > val_list.p_list->i_count) )
+    if( (i_spu < 0) || (i_spu > val_list.p_list->i_count) )
     {
         libvlc_exception_raise( p_e, "Subtitle value out of range" );
         goto end;