SQL error in function img_assist_get_references

Really this is just a small typo in the img_assist_get_references query. The reference to the node table inside the query is not aliased correctly, so an error like "Unknown table 'n' in field list query: SELECT n.nid, n.title FROM node WHERE status = 1 AND n.nid = 1" is logged and the block fails to load.

Patch is attached.