Fix ALLOC_GROW calls with obsolete semantics

ALLOC_GROW now expects the 'nr' argument to be "how much you
want" and not "how much you have". This fixes all cases
where we weren't previously adding anything to the 'nr'.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

dir.c

@@ -286,7 +286,7 @@ struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int
 	if (cache_name_pos(pathname, len) >= 0)
 		return NULL;
 
-	ALLOC_GROW(dir->entries, dir->nr, dir->alloc);
+	ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
 	return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
 }
 
@@ -295,7 +295,7 @@ struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname,
 	if (cache_name_pos(pathname, len) >= 0)
 		return NULL;
 
-	ALLOC_GROW(dir->ignored, dir->ignored_nr, dir->ignored_alloc);
+	ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
 	return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
 }