Simplify range check for audio_mode_t

AudioSystem::setMode previously allowed negative modes, but these were
then rejected by AudioFlinger.

Now negative modes (including AUDIO_MODE_INVALID and AUDIO_MODE_CURRENT)
are explicitly disallowed.

Change-Id: I0bac8fea737c8eb1f5b6afbb893e48739f88d745

1 files changed, 1 insertions, 1 deletions

diff --git a/services/audioflinger/AudioPolicyService.cpp b/services/audioflinger/AudioPolicyService.cpp
index f572fcebf417..3f86d58e6929 100644
--- a/services/audioflinger/AudioPolicyService.cpp
+++ b/services/audioflinger/AudioPolicyService.cpp
@@ -193,7 +193,7 @@ status_t AudioPolicyService::setPhoneState(int state)
     if (!checkPermission()) {
         return PERMISSION_DENIED;
     }
-    if (state < 0 || state >= AUDIO_MODE_CNT) {
+    if (uint32_t(state) >= AUDIO_MODE_CNT) {
         return BAD_VALUE;
     }