am 745b43c2: Merge "Fix issue 2589563: Able to set ringer volume to 0 outside of silent mode." into froyo

Merge commit '745b43c28fd6bb82c72a15b28be75c55dd115171' into froyo-plus-aosp

* commit '745b43c28fd6bb82c72a15b28be75c55dd115171':
  Fix issue 2589563: Able to set ringer volume to 0 outside of silent mode.

media/java/android/media/AudioService.java

@@ -1128,6 +1128,9 @@ public class AudioService extends IAudioService.Stub {
             if (direction == AudioManager.ADJUST_RAISE) {
                 // exiting silent mode
                 newRingerMode = AudioManager.RINGER_MODE_NORMAL;
+            } else {
+                // prevent last audible index to reach 0
+                adjustVolumeIndex = false;
             }
         }