Philip Withnall 251bab3e71 gobject: Add a missing NULL check for the return from lookup_type_node_I()
This can cause a `NULL` dereference on the next line if there is no
`TypeNode` for `iface_type`, for example if `iface_type ==
G_TYPE_INVALID`.

Unlikely, but possible since this API is public.

Spotted by Coverity.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Coverity CID: #1501602
2022-12-21 19:16:10 +00:00
..
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