Fix possibly incorrect type for format string

request may be int or unsigned long depending on the platform, but the
format string assumed unsigned long.

Signed-off-by: Bobby Bingham <koorogi@koorogi.info>

artsc/artsdsp.c

@@ -484,7 +484,7 @@ int ioctl (int fd, ioctl_request_t request, ...)
 #endif
 
         default:
-          artsdspdebug("aRts: unhandled /dev/dsp ioctl (%lx - %p)\n",request, argp);
+          artsdspdebug("aRts: unhandled /dev/dsp ioctl (%lx - %p)\n", (unsigned long)request, argp);
           break;
         }