qapi: Split up check_type()

check_type() can check type names, arrays, and implicit struct types.
Callers pass flags to select from this menu.  This makes the function
somewhat hard to read.  Moreover, a few minor bugs are hiding in
there, as we'll see shortly.

Split it into check_type_name(), check_type_name_or_array(), and
check_type_name_or_implicit().  Each of them is a copy of the original
specialized to a certain set of flags.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230316071325.492471-5-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Commit message corrected]
1 file changed