Dan Kegel : winealsa.drv: Don't return garbage if can't find active channel .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 3c070b22ef6ea1b16fbb3cd9f9391d132129df85
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=3c070b22ef6ea1b16fbb3cd9f9391d132129df85

Author: Dan Kegel <dank at kegel.com>
Date:   Sun Jan 13 22:51:24 2008 -0800

winealsa.drv: Don't return garbage if can't find active channel.

---

 dlls/winealsa.drv/mixer.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/dlls/winealsa.drv/mixer.c b/dlls/winealsa.drv/mixer.c
index fb989dc..cc38f8f 100644
--- a/dlls/winealsa.drv/mixer.c
+++ b/dlls/winealsa.drv/mixer.c
@@ -985,6 +985,12 @@ static DWORD MIX_GetControlDetails(UINT wDevID, LPMIXERCONTROLDETAILS mctrld, DW
                     break;
                 }
 
+	    if (chn > SND_MIXER_SCHN_LAST)
+	    {
+		TRACE("can't find active channel\n");
+		return MMSYSERR_INVALPARAM;  /* fixme: what's right error? */
+	    }
+
             mcdb->fValue = !ival;
             TRACE("=> %s\n", mcdb->fValue ? "on" : "off");
             return MMSYSERR_NOERROR;