isl_test_int.c: avoid for loop initial declarations
isl_test_int.c: avoid for loop initial declarations

They are not used anywhere else in the code base and
some compilers require C99 or C11 mode to parse them.

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

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