Fix rahash2 -B behavior

Previously `rahash2 -B` always printed an extra block at the end, which
matched the checksum of an empty file.

The line causing the bug has been left in the sources commented out, at
least for now, in case this causes some other regression.

libr/main/rahash2.c

@@ -291,7 +291,8 @@ static int do_hash(RahashOptions *ro, const char *file, const char *algo, RIO *i
 					}
 					do_hash_internal (ctx, ro, hashbit, buf, nsize, pj, rad, 1);
 				}
-				do_hash_internal (ctx, ro, hashbit, NULL, 0, pj, rad, 1);
+                                // Commented out to fix issue #23371
+                                // do_hash_internal (ctx, ro, hashbit, NULL, 0, pj, rad, 1);
 				ro->from = ofrom;
 				ro->to = oto;
 			}