Document: comparisons between isl_val and NaN always return false
Document: comparisons between isl_val and NaN always return false

Signed-off-by: Tobias Grosser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@grosser.es>
Signed-off-by: Sven Verdoolaege <235c10dd23b819f81cdc9756a251746bc184cab6@gmail.com>

PollyLabs/isl,Meinersbur/isl,PollyLabs/isl,inducer/isl-mirror,inducer/isl-mirror,Meinersbur/isl,PollyLabs/isl,Meinersbur/isl,inducer/isl-mirror,inducer/isl-mirror,nicolasvasilache/isl,PollyLabs/isl,nicolasvasilache/isl,nicolasvasilache/isl,inducer/isl-mirror,PollyLabs/isl,nicolasvasilache/isl,Meinersbur/isl,nicolasvasilache/isl