mixer: keep balance setting

Similarly to the last commit, restore the balance setting when switching
to a new file. Unlike the volume setting, balance is always implemented
as filter, so this affects usage without --softvol too.

1 files changed, 1 insertions, 0 deletions

diff --git a/mixer.h b/mixer.h
index 473933ecbe..1e45ac56b4 100644
--- a/mixer.h
+++ b/mixer.h
@@ -35,6 +35,7 @@ typedef struct mixer_s {
     float last_l, last_r;
     float softvol_l, softvol_r;
     int restore_softvol;
+    float balance;
 } mixer_t;
 
 void mixer_reinit(mixer_t *mixer);