Fix potential problems with if (for CMake < 3.1.0, CMP0054)
Fix potential problems with if (for CMake < 3.1.0, CMP0054)

fire-hunter/hunter,ingenue/hunter,shekharhimanshu/hunter,fwinnen/hunter,ruslo/hunter,mchiasson/hunter,xsacha/hunter,stohrendorf/hunter,madmongo1/hunter,shekharhimanshu/hunter,ikliashchou/hunter,fwinnen/hunter,caseymcc/hunter,pretyman/hunter,ErniBrown/hunter,lucmichalski/hunter,zhuhaow/hunter,isaachier/hunter,mchiasson/hunter,NeroBurner/hunter,Knitschi/hunter,jkhoogland/hunter,dmpriso/hunter,x10mind/hunter,zhuhaow/hunter,isaachier/hunter,dan-42/hunter,vdsrd/hunter,ledocc/hunter,madmongo1/hunter,tatraian/hunter,RomanYudintsev/hunter,tatraian/hunter,caseymcc/hunter,caseymcc/hunter,dvirtz/hunter,ErniBrown/hunter,ingenue/hunter,fire-hunter/hunter,sumedhghaisas/hunter,vdsrd/hunter,pretyman/hunter,Knitschi/hunter,Knitschi/hunter,dvirtz/hunter,dmpriso/hunter,ulricheck/hunter,daminetreg/hunter,dmpriso/hunter,alamaison/hunter,ThomasFeher/hunter,ruslo/hunter,isaachier/hunter,shekharhimanshu/hunter,pretyman/hunter,ThomasFeher/hunter,madmongo1/hunter,daminetreg/hunter,ikliashchou/hunter,zhuhaow/hunter,designerror/hunter,ulricheck/hunter,dan-42/hunter,xsacha/hunter,lucmichalski/hunter,pretyman/hunter,ThomasFeher/hunter,ingenue/hunter,akalsi87/hunter,designerror/hunter,akalsi87/hunter,RomanYudintsev/hunter,jkhoogland/hunter,headupinclouds/hunter,x10mind/hunter,alamaison/hunter,jkhoogland/hunter,mchiasson/hunter,stohrendorf/hunter,stohrendorf/hunter,designerror/hunter,tatraian/hunter,dan-42/hunter,ErniBrown/hunter,isaachier/hunter,sumedhghaisas/hunter,dan-42/hunter,ruslo/hunter,ikliashchou/hunter,xsacha/hunter,daminetreg/hunter,ruslo/hunter,headupinclouds/hunter,ikliashchou/hunter,xsacha/hunter,sumedhghaisas/hunter,fwinnen/hunter,NeroBurner/hunter,NeroBurner/hunter,vdsrd/hunter,NeroBurner/hunter,madmongo1/hunter,x10mind/hunter,ledocc/hunter,RomanYudintsev/hunter,fire-hunter/hunter,dvirtz/hunter,akalsi87/hunter,headupinclouds/hunter,lucmichalski/hunter,ingenue/hunter,alamaison/hunter,mchiasson/hunter,ledocc/hunter,ulricheck/hunter,ErniBrown/hunter