Fix enumeration on OS X.

diff --git a/serialport.c b/serialport.c
index b47ddd931b50692e0d5e6470e0509d870d6b3583..7022a9dedc8e16d5427d51dd74f54b488e779bb1 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -205,7 +205,7 @@ out_done:
        CFDictionarySetValue(classes,
                        CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
 
-       if (!(IOServiceGetMatchingServices(master, classes, &iter)))
+       if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS)
        {
                ret = SP_ERR_FAIL;
                goto out_done;