Fix pointer signedness warning in nettle-lfib-stream.

ChangeLog

@@ -25,6 +25,8 @@
 	argument to test_armor.
 	* testsuite/base64-test.c (test_main): Likewise.
 
+	* tools/nettle-lfib-stream.c (main): Fix pointer signedness warning.
+
 2016-08-29  Niels Möller  <nisse@lysator.liu.se>
 
 	* sexp-format.c (strlen_u8): New helper function.

tools/nettle-lfib-stream.c

@@ -80,10 +80,10 @@ main(int argc, char **argv)
 
   for (;;)
     {
-      char buffer[BUFSIZE];
-      knuth_lfib_random(&ctx, BUFSIZE, buffer);
+      uint8_t buffer[BUFSIZE];
+      knuth_lfib_random(&ctx, sizeof(buffer), buffer);
 
-      if (fwrite(buffer, 1, BUFSIZE, stdout) < BUFSIZE
+      if (fwrite(buffer, 1, sizeof(buffer), stdout) < sizeof(buffer)
 	  || fflush(stdout) < 0)
 	return EXIT_FAILURE;
     }