HPCC-9426 Unprojected disk read with virtuals allocated too little memory

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4453 from ghalliday/issue9426

HPCC-9426 Unprojected disk read with virtuals allocated too little memory

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>