Update imath to 23b2b1f
Update imath to 23b2b1f

This update addresses the following two imath bugs:

  - A missed free() call was causing a memory leak
  - tolower/toupper have been called on a NULL value

Signed-off-by: Tobias Grosser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@grosser.es>
Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

KangDroidSMProject/ISL,inducer/isl-mirror,PollyLabs/isl,UBERTC/isl,Meinersbur/isl,inducer/isl-mirror,Distrotech/isl,evaautomation/isl,nicolasvasilache/isl,simbuerg/isl,evaautomation/isl,Meinersbur/isl,Meinersbur/isl,KangDroidSMProject/ISL,BenzoSM/isl,Distrotech/isl,KangDroidSMProject/ISL,PollyLabs/isl,nicolasvasilache/isl,inducer/isl-mirror,BenzoSM/isl,inducer/isl-mirror,UBERTC/isl,evaautomation/isl,PollyLabs/isl,tobig/isl,BenzoSM/isl,simbuerg/isl,PollyLabs/isl,Meinersbur/isl,simbuerg/isl,nicolasvasilache/isl,simbuerg/isl,UBERTC/isl,Distrotech/isl,UBERTC/isl,simbuerg/isl,Distrotech/isl,Distrotech/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,tobig/isl,PollyLabs/isl,tobig/isl,inducer/isl-mirror,tobig/isl,evaautomation/isl,BenzoSM/isl,KangDroidSMProject/ISL,BenzoSM/isl,nicolasvasilache/isl