Merge branch 'jm/maint-1.6.5-grep-NUL-terminate' into maint

* jm/maint-1.6.5-grep-NUL-terminate:
  grep: NUL terminate input from a file

builtin-grep.c

@@ -205,6 +205,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
 		return 0;
 	}
 	close(i);
+	data[sz] = 0;
 	if (opt->relative && opt->prefix_length)
 		filename = quote_path_relative(filename, -1, &buf, opt->prefix);
 	i = grep_buffer(opt, filename, data, sz);