ac97: recalculate active after loadvm

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/ac97.c b/hw/ac97.c
index 36aab8a..e89a56a 100644
--- a/hw/ac97.c
+++ b/hw/ac97.c
@@ -1242,6 +1242,9 @@
     V_ (AC97_Line_In_Volume_Mute, AUD_MIXER_LINE_IN);
 #undef V_
 #endif
+    active[PI_INDEX] = !!(s->bm_regs[PI_INDEX].cr & CR_RPBM);
+    active[PO_INDEX] = !!(s->bm_regs[PO_INDEX].cr & CR_RPBM);
+    active[MC_INDEX] = !!(s->bm_regs[MC_INDEX].cr & CR_RPBM);
     reset_voices (s, active);
 
     s->bup_flag = 0;