udev: Use g_ascii_isalnum instead of isalnum

diff --git a/plugins/udev.c b/plugins/udev.c
index d0673f7..79027d7 100644 (file)
--- a/plugins/udev.c
+++ b/plugins/udev.c
@@ -88,7 +88,7 @@ static const char *get_serial(struct udev_device *udev_device)
                unsigned int i, len = strlen(serial);
 
                for (i = 0; i < len; i++) {
-                       if (!isalnum(serial[i]))
+                       if (!g_ascii_isalnum(serial[i]))
                                return NULL;
                }
        }