BUG#6034 - Error code 124: Wrong medium type

Merged a different solution from 4.1 to 5.0.
Unexplainable diffs.


mysql-test/r/insert_select.result:
  BUG#6034 - Error code 124:  Wrong medium type
  Merge seems to replace the test results by a new version of itself.
mysql-test/t/insert_select.test:
  BUG#6034 - Error code 124:  Wrong medium type
  Merge seems to replace the test case by a new version of itself.
sql/sql_select.cc:
  BUG#6034 - Error code 124:  Wrong medium type
  This is solved differently between 5.0 and 4.1.
  The differences are unexplainable.
  result->prepare2() is new to 5.0, but doesn't
  appear in the diffs. Weird.