Major bug fix to --union-test

lib/core/agent.py

@@ -453,7 +453,7 @@ class Agent:
             query        = query[len("TOP %s " % topNum):]
             inbandQuery += "TOP %s " % topNum
 
-        if not exprPosition:
+        if not isinstance(exprPosition, int):
             exprPosition = kb.unionPosition
 
         intoRegExp = re.search("(\s+INTO (DUMP|OUT)FILE\s+\'(.+?)\')", query, re.I)

lib/core/session.py

@@ -232,7 +232,7 @@ def setUnion(comment=None, count=None, position=None, negative=False, falseCond=
         kb.unionComment = comment
         kb.unionCount = count
 
-    if position:
+    if position is not None:
         condition = (
                       not kb.resumedQueries or ( kb.resumedQueries.has_key(conf.url) and
                       ( not kb.resumedQueries[conf.url].has_key("Union position")