Update XZ Utils to 5.0.4 (third_party)

doc/examples_old/xz_pipe_decomp.c

 /*
  * xz_pipe_decomp.c
  * A simple example of pipe-only xz decompressor implementation.
- * version: 2010-07-12 - by Daniel Mealha Cabrita
+ * version: 2012-06-14 - by Daniel Mealha Cabrita
  * Not copyrighted -- provided to the public domain.
  *
  * Compiling:
  * Link with liblzma. GCC example:
  * $ gcc -llzma xz_pipe_decomp.c -o xz_pipe_decomp
  *
  * Usage example:
  * $ cat some_file.xz | ./xz_pipe_decomp > some_file
  */
 
@@ skipping 79 matching lines @@
                                 out_len = OUT_BUF_MAX - strm.avail_out;
                                 fwrite (out_buf, 1, out_len, out_file);
                                 if (ferror (out_file)) {
                                         out_finished = true;
                                         ret = RET_ERROR_OUTPUT;
                                 }
                         }
                 } while (strm.avail_out == 0);
         }
 
+        /* Bug fix (2012-06-14): If no errors were detected, check
+           that the last lzma_code() call returned LZMA_STREAM_END.
+           If not, the file is probably truncated. */
+        if ((ret == RET_OK) && (ret_xz != LZMA_STREAM_END)) {
+                fprintf (stderr, "Input truncated or corrupt\n");
+                ret = RET_ERROR_DECOMPRESSION;
+        }
+
         lzma_end (&strm);
         return ret;
 }
 
 int main ()
 {
         int ret;
 
         ret = xz_decompress (stdin, stdout);
         return ret;
 }