PulseAudio: Try fixing a division by zero error.

Public issue https://github.com/mackron/miniaudio/issues/412

miniaudio.h

@@ -28951,9 +28951,13 @@ static ma_result ma_device_init__pulse(ma_device* pDevice, const ma_device_confi
             attr = *pActualAttr;
         }
 
-        pDescriptorCapture->periodCount        = attr.maxlength / attr.fragsize;
-        pDescriptorCapture->periodSizeInFrames = attr.maxlength / ma_get_bytes_per_frame(pDescriptorCapture->format, pDescriptorCapture->channels) / pDescriptorCapture->periodCount;
+        if (attr.fragsize > 0) {
+            pDescriptorPlayback->periodCount = ma_max(attr.maxlength / attr.fragsize, 1);
+        } else {
+            pDescriptorPlayback->periodCount = 1;
+        }
 
+        pDescriptorCapture->periodSizeInFrames = attr.maxlength / ma_get_bytes_per_frame(pDescriptorCapture->format, pDescriptorCapture->channels) / pDescriptorCapture->periodCount;
         ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_INFO, "[PulseAudio] Capture actual attr: maxlength=%d, tlength=%d, prebuf=%d, minreq=%d, fragsize=%d; periodSizeInFrames=%d\n", attr.maxlength, attr.tlength, attr.prebuf, attr.minreq, attr.fragsize, pDescriptorCapture->periodSizeInFrames);
     }
 
@@ -29058,7 +29062,12 @@ static ma_result ma_device_init__pulse(ma_device* pDevice, const ma_device_confi
             attr = *pActualAttr;
         }
 
+        if (attr.tlength > 0) {
             pDescriptorPlayback->periodCount = ma_max(attr.maxlength / attr.tlength, 1);
+        } else {
+            pDescriptorPlayback->periodCount = 1;
+        }
+
         pDescriptorPlayback->periodSizeInFrames = attr.maxlength / ma_get_bytes_per_frame(pDescriptorPlayback->format, pDescriptorPlayback->channels) / pDescriptorPlayback->periodCount;
         ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_INFO, "[PulseAudio] Playback actual attr: maxlength=%d, tlength=%d, prebuf=%d, minreq=%d, fragsize=%d; internalPeriodSizeInFrames=%d\n", attr.maxlength, attr.tlength, attr.prebuf, attr.minreq, attr.fragsize, pDescriptorPlayback->periodSizeInFrames);
     }