classifier: Fix use of uninitialized value.
Coverity reports use of uninitialized value of cursor.
This happens in cls_cursor_start(), when rule is false,
cursor.subtable is uninitialized. CID 279324.
@@ -1370,6 +1370,7 @@ cls_cursor_start(const struct classifier *cls, const struct cls_rule *target,
struct cls_cursor cursor;
struct cls_subtable *subtable;
+ memset(&cursor, 0x0, sizeof cursor);
cursor.cls = cls;
cursor.target = target && !cls_rule_is_catchall(target) ? target : NULL;
cursor.version = version;
