fix for a resume bug reported by Augusto Urbieta

doc/THANKS

@@ -361,6 +361,8 @@ Stuffe <[email protected]>
 Sylphid <[email protected]>
     for suggesting some features
 
+Augusto Urbieta <[email protected]>
+    for reporting a minor bug
 
 == Organizations ==
 

lib/utils/resume.py

@@ -150,6 +150,9 @@ def resume(expression, payload):
     if not payload:
         return None
 
+    if not kb.dbms:
+        return None
+
     substringQuery = queries[kb.dbms].substring
     select = re.search("\ASELECT ", expression, re.I)