builtin-merge: add missing structure initialization

The parameter that is eventually passed to read_directory() to scan the
working tree should be properly initialized.

Signed-off-by: Pierre Habouzit <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: MadCoder

builtin-merge.c

@@ -572,6 +572,7 @@ static int checkout_fast_forward(unsigned char *head, unsigned char *remote)
 	memset(&trees, 0, sizeof(trees));
 	memset(&opts, 0, sizeof(opts));
 	memset(&t, 0, sizeof(t));
+	memset(&dir, 0, sizeof(dir));
 	dir.show_ignored = 1;
 	dir.exclude_per_dir = ".gitignore";
 	opts.dir = &dir;