Patch from Denis Vlasenko to add xstat() and use it.

archival/gunzip.c

@@ -103,9 +103,7 @@ int gunzip_main(int argc, char **argv)
 			src_fd = bb_xopen(old_path, O_RDONLY);
 
 			/* Get the time stamp on the input file. */
-			if (stat(old_path, &stat_buf) < 0) {
-				bb_error_msg_and_die("Couldn't stat file %s", old_path);
-			}
+			xstat(old_path, &stat_buf);
 		}
 
 		/* Check that the input is sane.  */