squashfs: show an error message if the inode_table can't be, allocated

Signed-off-by: Lars Weber <weber@weber-software.com>
diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c
index e2d91c6..5d9c52a 100644
--- a/fs/squashfs/sqfs.c
+++ b/fs/squashfs/sqfs.c
@@ -728,6 +728,8 @@
 	*inode_table = malloc(metablks_count * SQFS_METADATA_BLOCK_SIZE);
 	if (!*inode_table) {
 		ret = -ENOMEM;
+		printf("Error: failed to allocate squashfs inode_table of size %i, increasing CONFIG_SYS_MALLOC_LEN could help\n",
+		       metablks_count * SQFS_METADATA_BLOCK_SIZE);
 		goto free_itb;
 	}