audioio: Fix unnecessarily inefficient device enumeration.

mini_al.h

@@ -15398,7 +15398,7 @@ mal_result mal_context_enumerate_devices__sndio(mal_context* pContext, mal_enum_
         mal_itoa_s(iDevice, devpath+strlen(devpath), sizeof(devpath)-strlen(devpath), 10);
     
         struct stat st;
-        if (stat(devpath, &st) != 0) {
+        if (stat(devpath, &st) < 0) {
             break;
         }
         
@@ -16095,7 +16095,10 @@ mal_result mal_context_enumerate_devices__audioio(mal_context* pContext, mal_enu
         mal_itoa_s(iDevice, devpath+strlen(devpath), sizeof(devpath)-strlen(devpath), 10);
     
         struct stat st;
-        if (stat(devpath, &st) == 0) {
+        if (stat(devpath, &st) < 0) {
+            break;
+        }
+
         // The device exists, but we need to check if it's usable as playback and/or capture.
         int fd;
         mal_bool32 isTerminating = MAL_FALSE;
@@ -16136,7 +16139,6 @@ mal_result mal_context_enumerate_devices__audioio(mal_context* pContext, mal_enu
             break;
         }
     }
-    }
     
     return MAL_SUCCESS;
 }