Remove malloc.h include from sioimath file
Remove malloc.h include from sioimath file

This include is not needed by isl and breaks, due to not being
available, compilation on darwin.

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

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