Fix build issue that compiler options treat warnning as a error

type defaults to 'int' in declaration of 'md_align_offset'.
[-Werror=implicit-int].
97 | static md_align_offset;.

Change-Id: I909ad4aaa4a20e9c6291798777ebf197beb61160
Signed-off-by: Shudan Liu <quic_shudan@quicinc.com>