Signed-off-by: Fu Wei <fu.wei@linaro.org>

struct ... foo = { 0, } is valid initializer, but older GCC emits
warning which is fatal error due to -Werror=missing-field-initializer.
So simply use full initializer to avoid these errors. This was fixed
probably in GCC 4.7.

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36750

Currently, if "linux" fails, the "goto fail;" in grub_cmd_initrd sends us
into grub_initrd_close() without grub_initrd_init() being called, and thus
it never clears initrd_ctx->components.  grub_initrd_close() then frees that
address, which is stale data from the stack.  If the stack happens to have a
stale *address* there that matches a recent allocation, then you'll get a
double free later.

So initialize the memory up front.
Signed-off-by: Peter Jones <pjones@redhat.com>

	Suggested by: D. Prévot.

The length of the Device Path End entry in the grub_linux_boot()
function was incorrectly set to 0. This triggers an assert failure
in debug builds of Tianocore.

Set it to sizeof (grub_efi_device_path_t).

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>