serial backend: unbreak build on BSD (#548)

The comments aren't properly protected leading to the following error:
backend/serial.c:822:16: error: expected ';' after expression
                                         * devices

diff --git a/backend/serial.c b/backend/serial.c
index 1c3623d3d07c12d609e1b2409da76678d6eaafb3..585e98d5c81fd8e8e935dd6a9cfc35124f115695 100644 (file)
--- a/backend/serial.c
+++ b/backend/serial.c
@@ -818,8 +818,8 @@ list_devices(void)
 {
 #if defined(__sun) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
   static char  *funky_hex = "0123456789abcdefghijklmnopqrstuvwxyz";
-                                       // Funky hex numbering used for some *
-                                        * devices                          
+                                       /* Funky hex numbering used for some *
+                                        * devices                           */
 #endif // __sun || __FreeBSD__ || __OpenBSD__ || __FreeBSD_kernel__