Fix compiler warning

scardcontrol.c:851:27: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘DWORD’ {aka ‘long unsigned int’} [-Wformat=]
  printf(" card response [%d bytes]:", length);
                          ~^           ~~~~~~
                          %ld

examples/scardcontrol.c

@@ -848,7 +848,7 @@ int main(int argc, char *argv[])
 		error = TRUE;
 
 	printf(error ? RED : GREEN);
-	printf(" card response [%d bytes]:", length);
+	printf(" card response [%"LF"d bytes]:", length);
 	for (i=0; i<length; i++)
 		printf(" %02X", bRecvBuffer[i]);
 	printf(": %s", pinpad_return_codes(length, bRecvBuffer));