Fixed issue where old IE versions could throw errors while initializing.
Fixed issue where old IE versions could throw errors while initializing.

VioletLife/tinymce,gabixdev/tinymce,danielpunkass/tinymce,toxalot/tinymce,fashionsun/tinymce,MediehusetTek/tinymce,rbecheras/tinymce,tinymce/tinymce,bsuh/tinymce,nbcp/tinymce,TeamupCom/tinymce,blakewallan/tinymce,gencer/tinymce,endjin/tinymce,mplank/tinymce,dziemian007/tinymce,widgetfactory/tinymce,FernCreek/tinymce,fhchina/tinymce,shilpi230/tinymce,henrythewasp/tinymce,ice8lue/tinymce,simachewh/tinymce,aduth/tinymce,rednose-public/tinymce,jtark/tinymce,1099511627776/tinymce,danielpunkass/tinymce,rbecheras/tinymce,tinymce/tinymce,nikolas/tinymce,ice8lue/tinymce,support-dot-com/tinymce,enfold/tinymce,rxl194/tinymce,toxalot/tinymce,M4R7iNP/tinymce,simachewh/tinymce,ChristophKaser/tinymce,kencheung/tinymce,mplank/tinymce,nikolas/tinymce,Razzwan/tinymce,fhchina/tinymce,cclaerhout/tinymce,henrythewasp/tinymce,jashua212/tinymce,Kindling/tinymce,MediehusetTek/tinymce,howanghk/tinymce,danchr/tinymce,danchr/tinymce,Razzwan/tinymce,blakewallan/tinymce,endjin/tinymce,Zimbra/tinymce,ikuchmin/tinymce,rxl194/tinymce,enfold/tinymce,adaptiffdesigns/tinymce,rednose-public/tinymce,FernCreek/tinymce,M4R7iNP/tinymce,pmpl-5/tinymce,Kindling/tinymce,gabixdev/tinymce,tinymce/tinymce,TeamupCom/tinymce,sachgits/tinymce,fillabs/TinySpecMCE,howanghk/tinymce,sjbufton/tinymce,collective/tinymce,sjbufton/tinymce,support-dot-com/tinymce,fillabs/TinySpecMCE,ETSI-CTI/TinySpecMCE,VioletLife/tinymce,jashua212/tinymce,Zimbra/tinymce,widgetfactory/tinymce,1099511627776/tinymce,bsuh/tinymce,ikuchmin/tinymce,nbcp/tinymce,ChristophKaser/tinymce,jtark/tinymce,dziemian007/tinymce,shilpi230/tinymce,FernCreek/tinymce,cclaerhout/tinymce,leofeyer/tinymce,aduth/tinymce,fashionsun/tinymce,danielpunkass/tinymce,adaptiffdesigns/tinymce,kencheung/tinymce,pmpl-5/tinymce,sachgits/tinymce,Shopify/tinymce,ETSI-CTI/TinySpecMCE,gencer/tinymce,leofeyer/tinymce,collective/tinymce