libteam: check opt_id.name for null
libteam: check opt_id.name for null

Coverity error:
CID 1031792 (#1 of 1): Explicit null dereferenced (FORWARD_NULL)7. var_deref_model: Passing "&opt_id" to function "find_option(struct team_handle *, struct team_option_id *, bool)", which dereferences null "opt_id.name"

Signed-off-by: Jiri Pirko <1b548d10035ae428195c41f5d55eedb1437ccd8a@resnulli.us>

ekinzie/libteam,jpirko/libteam,marceloleitner/libteam,ekinzie/libteam,marceloleitner/libteam,marceloleitner/libteam,jpirko/libteam,ekinzie/libteam,jpirko/libteam