Fixed missing dep

Signed-off-by: David Decotigny <david@decotigny.fr>

ocitysmap2/index/indexer.py

@@ -28,6 +28,7 @@ import locale
 import psycopg2
 
 from ocitysmap2.index import commons
+from ocitysmap2 import coords
 
 import psycopg2.extensions
 # compatibility with django: see http://code.djangoproject.com/ticket/5996