- fixed bug in join view processing
- postreview fixes (BUG#9398 & BUG#8703)


sql/sql_base.cc:
  used original TABLE object to get correct name of table and db
sql/sql_view.cc:
  fixed bug of assigning select_lex for join view
sql/table.cc:
  comment fixed
  stack overflow check added
  new method for underlying base table finding
sql/table.h:
  comment fixed
  new method for underlying base table finding