Do not enforce type check when checking for history support
Do not enforce type check when checking for history support

At least IE9 returns undefined instead of null and thus history support
would be incorrectly set to true if using strict comparison.

lzhengms/director,meleslilijing/director,pocketjoso/director,sheldonzf/director,pandoraui/director,webx32/director,mylikes/director,stonegithubs/director,ks3dev/director,andradedev/director,fadeit/director,maxogden/director,stonegithubs/director,tanzhihang/director,vitalsource/director,fadeit/director,meleslilijing/director,lzhengms/director,tanzhihang/director,GerHobbelt/director,vitalsource/director,ks3dev/director,sheldonzf/director,andradedev/director,flatiron/director,pandoraui/director,GerHobbelt/director,kiritoe/director,pocketjoso/director,kiritoe/director,mylikes/director,cpg1111/director,webx32/director,cpg1111/director