mix() is really a private method, only to be called by the audio thread; cover setupPremix by the mutex, too (that helps preventing race conditions upon exit)

svn-id: r8809

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/mixer.cpp b/sound/mixer.cpp
index 666f31e1a7..6be55b866d 100644
--- a/sound/mixer.cpp
+++ b/sound/mixer.cpp
@@ -356,6 +356,7 @@ bool SoundMixer::isActiveChannel(int index) {
 }
 
 void SoundMixer::setupPremix(void *param, PremixProc *proc) {
+	StackLock lock(_mutex);	
 	_premixParam = param;
 	_premixProc = proc;
 }