Bug 1269165 - Restore ALSA plugins detection on non-Linux after bug 757637. r=jesup

--HG--
extra : rebase_source : b655bc3c2928c18ab8ed3fb170926ea8213a122b

media/webrtc/trunk/webrtc/modules/audio_device/linux/audio_device_alsa_linux.cc

@@ -1752,7 +1752,9 @@ int32_t AudioDeviceLinuxALSA::GetDevicesInfo(
     // Don't use snd_device_name_hint(-1,..) since there is a access violation
     // inside this ALSA API with libasound.so.2.0.0.
     int card = -1;
+#ifdef WEBRTC_LINUX
     while (!(LATE(snd_card_next)(&card)) && (card >= 0) && keepSearching) {
+#endif
         void **hints;
         err = LATE(snd_device_name_hint)(card, "pcm", &hints);
         if (err != 0)
@@ -1878,7 +1880,9 @@ int32_t AudioDeviceLinuxALSA::GetDevicesInfo(
                          LATE(snd_strerror)(err));
             // Continue and return true anyway, since we did get the whole list.
         }
+#ifdef WEBRTC_LINUX
       }
+#endif
 
     if (FUNC_GET_NUM_OF_DEVICE == function)
     {