db: save function pointers saved in arrays of structs

db: save function pointers saved in arrays of structs

Smatch saves function pointers saved to structs like this:
struct some_handler handler = {
	.data = 9,
	.function = &func,
};

But now it handles function pointers saved to an array of structs like this:
struct some_handler handlers[] = {
	[FOO] = { .data = 9, .function = &func, },
	...
};

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>