Just "packed" doesn't always pack the way we expect.

	unsigned arithmetics.
	Add missing break.

	incorrect cbcr setting when in color mode.

	greyscale support.

	Fix formula for computing total number of bytes.

	image processing, fix big-endian and support grayscale.

	rather than printf.
	* grub-core/video/readers/tga.c: Likewise.

	on it.

	pointer checks before calling grub_free().
	* grub-core/commands/wildcard.c (match_devices): Likewise.
	* grub-core/commands/wildcard.c (match_files): Likewise.
	* grub-core/fs/cpio.c (grub_cpio_dir): Likewise.
	* grub-core/fs/cpio.c (grub_cpio_open): Likewise.
	* grub-core/fs/udf.c (grub_udf_read_block): Likewise.
	* grub-core/fs/xfs.c (grub_xfs_read_block): Likewise.
	* grub-core/loader/efi/chainloader.c (grub_cmd_chainloader): Likewise.
	* grub-core/normal/cmdline.c (grub_cmdline_get): Likewise.
	* grub-core/script/yylex.l (grub_lexer_unput): Likewise.
	* grub-core/video/readers/jpeg.c (grub_video_reader_jpeg): Likewise.
	* grub-core/video/readers/png.c (grub_png_output_byte): Likewise.

	* grub-core/video/readers/jpeg.c (JPEG_MARKER_DRI): New define.
	(JPEG_MARKER_RST0): Likewise.
	(JPEG_MARKER_RST1): Likewise.
	(JPEG_MARKER_RST2): Likewise.
	(JPEG_MARKER_RST3): Likewise.
	(JPEG_MARKER_RST4): Likewise.
	(JPEG_MARKER_RST5): Likewise.
	(JPEG_MARKER_RST6): Likewise.
	(JPEG_MARKER_RST7): Likewise.
	(grub_jpeg_data): New fields dri, r1, bitmap_ptr.
	(grub_jpeg_decode_dri): New function.
	(grub_jpeg_decode_sos): Move image data related part into
	grub_jpeg_decode_data function.
	(grub_jpeg_decode_data): New function.
	(grub_jpeg_reset): New function.
	(grub_jpeg_decode_jpeg): Handle new markers.

	guidelines.

	* grub-core/kern/dl.c (grub_dl_check_license): New function.
	(grub_dl_load_core): Use grub_dl_check_license.
	* include/grub/dl.h (GRUB_MOD_SECTION): New macro.
	(GRUB_MOD_LICENSE): Likewise.
	(GRUB_MOD_DUAL_LICENSE): Likewise.
	All modules updated.