COMP: Fix compiler warning
COMP: Fix compiler warning

EvaluateSegmentation/source/LesionDetection.h:522:38: warning: result of comparison against a string literal is unspecified (use strncmp instead) [-Wstring-compare]
        if(maskFile!=ITK_NULLPTR && maskFile!=""){

Visceral-Project/EvaluateSegmentation,Visceral-Project/EvaluateSegmentation