COUNT(*) is 0" (the test case has been pushed already)


sql/sql_cursor.cc:
  Fix a return of an unitialized variable: return_zero_rows
  checks the return value of send_fields and in case it's 1
  doesn't call send_data. This caused creation of an empty result 
  set for the case when there is a cursor against a select with a 
  group function and no matching rows.