fixing typo for databases dictionary

bin/compile

@@ -94,7 +94,7 @@ import os, sys, urlparse
 urlparse.uses_netloc.append('postgres')
 urlparse.uses_netloc.append('mysql')
 try:
-    if os.environ.has_key('DATABASE_URL') and DATABASE != None:
+    if os.environ.has_key('DATABASE_URL') and DATABASES != None:
         url = urlparse.urlparse(os.environ['DATABASE_URL'])
         DATABASES['default'] = {
             'NAME':     url.path[1:],