Fix memory leak in CtControl::readBlock
When reading more than one image block:
- Not in stripe-concat acq_mode or
- Reading more than one buffer
Probably the memory leak seen on BM18 with the TOMO scans and Iris (when Flint is active).
When reading more than one image block:
Probably the memory leak seen on BM18 with the TOMO scans and Iris (when Flint is active).