ALSA: Fix some warnings relating to unhandled return value of `read()`.

CHANGES.md

 v0.11.22 - TBD
 =====================
+* ALSA: Fix some warnings relating to unhandled return value of `read()`.
 * DirectSound: Add support for specifying an explicit window handle for SetCooperativeLevel().
 
 

miniaudio.h

@@ -28073,6 +28073,7 @@ static ma_result ma_device_stop__alsa(ma_device* pDevice)
     a small chance that our wakeupfd has not been cleared. We'll clear that out now if applicable.
     */
     int resultPoll;
+    int resultRead;
 
     if (pDevice->type == ma_device_type_capture || pDevice->type == ma_device_type_duplex) {
         ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_DEBUG, "[ALSA] Dropping capture device...\n");
@@ -28091,7 +28092,10 @@ static ma_result ma_device_stop__alsa(ma_device* pDevice)
         resultPoll = poll((struct pollfd*)pDevice->alsa.pPollDescriptorsCapture, 1, 0);
         if (resultPoll > 0) {
             ma_uint64 t;
-        read(((struct pollfd*)pDevice->alsa.pPollDescriptorsCapture)[0].fd, &t, sizeof(t));
+            resultRead = read(((struct pollfd*)pDevice->alsa.pPollDescriptorsCapture)[0].fd, &t, sizeof(t));
+            if (resultRead != sizeof(t)) {
+                ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_DEBUG, "[ALSA] Failed to read from capture wakeupfd. read() = %d\n", resultRead);
+            }
         }
     }
 
@@ -28112,7 +28116,10 @@ static ma_result ma_device_stop__alsa(ma_device* pDevice)
         resultPoll = poll((struct pollfd*)pDevice->alsa.pPollDescriptorsPlayback, 1, 0);
         if (resultPoll > 0) {
             ma_uint64 t;
-        read(((struct pollfd*)pDevice->alsa.pPollDescriptorsPlayback)[0].fd, &t, sizeof(t));
+            resultRead = read(((struct pollfd*)pDevice->alsa.pPollDescriptorsPlayback)[0].fd, &t, sizeof(t));
+            if (resultRead != sizeof(t)) {
+                ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_DEBUG, "[ALSA] Failed to read from playback wakeupfd. read() = %d\n", resultRead);
+            }
         }
 
     }