Fix message offset for nested controllers
Fix message offset for nested controllers

This fixes the message offset when building with iOS 6 SDK and using nested controllers, e.g. a `UISplitViewController` and displaying the message on one of its children.
joanromano/TSMessages,ezescaruli/TSMessages,yangyangluoluo/TSMessages,OspreyRen/TSMessages,MatiMil/TSMessages,instaply/TSMessages,winzig/TSMessages,Papercloud/TSMessages,amogilevskiy/TSMessages,baconja/TSMessages,hanhailong/TSMessages,Papercloud/TSMessages,vixentael/TSMessages,svlaev/TSMessages,DaGaMs/TSMessages,Hotel-Reservation-Service/TSMessages,idikic/TSMessages,vixentael/TSMessages,SampleLiao/TSMessages,amogilevskiy/TSMessages,Papercloud/TSMessages,idikic/TSMessages,howeguo/TSMessages,caamorales/TSMessages,prolificinteractive/TSMessages,lijie121210/TSMessages,SimplifydigitalLtd/TSMessages,MatiMil/TSMessages,JCheungX/TSMessages,SampleLiao/TSMessages,joanromano/TSMessages,lamson/TSMessages,svlaev/TSMessages,joanromano/TSMessages,ricardopereira/TSMessages,DaGaMs/TSMessages,lamson/TSMessages,prolificinteractive/TSMessages,ernestopino/TSMessages,baconja/TSMessages,OspreyRen/TSMessages,yangyangluoluo/TSMessages,cnbin/TSMessages,spinlister/TSMessages,instaply/TSMessages,XBeg9/TSMessages,idikic/TSMessages,caamorales/TSMessages,ezescaruli/TSMessages,benzhipeng/TSMessages,hanhailong/TSMessages,yangyangluoluo/TSMessages,benzhipeng/TSMessages,benjaminjackson/TSMessages,XBeg9/TSMessages,wjacker/TSMessages,LaserPatrick/TSMessages,sunyazhou13/TSMessages,winzig/TSMessages,lamson/TSMessages,ergunkocak/TSMessages,Skalstad2105/TSMessages,Hotel-Reservation-Service/TSMessages,caamorales/TSMessages,ezescaruli/TSMessages,amogilevskiy/TSMessages,okuyigaj/TSMessages,LaserPatrick/TSMessages,broadcastsport/TSMessages,kavichen/TSMessages,ezescaruli/TSMessages,FrostDigital/TSMessages,HqRaining78/TSMessages,Skalstad2105/TSMessages,svlaev/TSMessages,howeguo/TSMessages,ricardopereira/TSMessages,cnbin/TSMessages,SimplifydigitalLtd/TSMessages,yangyangluoluo/TSMessages,Papercloud/TSMessages,howeguo/TSMessages,XBeg9/TSMessages,HqRaining78/TSMessages,SampleLiao/TSMessages,HqRaining78/TSMessages,kennethpu/TSMessages,broadcastsport/TSMessages,okuyigaj/TSMessages,benjaminjackson/TSMessages,SampleLiao/TSMessages,benjaminjackson/TSMessages,prolificinteractive/TSMessages,idikic/TSMessages,caamorales/TSMessages,HqRaining78/TSMessages,ernestopino/TSMessages,alexfeng/TSMessages,SimplifydigitalLtd/TSMessages,baconja/TSMessages,broadcastsport/TSMessages,instaply/TSMessages,yunzhongyoulong/TSMessages,MatiMil/TSMessages,hanhailong/TSMessages,wjacker/TSMessages,howeguo/TSMessages,cnbin/TSMessages,ernestopino/TSMessages,FrostDigital/TSMessages,ranbeuer/TSMessages,LaserPatrick/TSMessages,ergunkocak/TSMessages,wikimedia/TSMessages,benjaminjackson/TSMessages,OspreyRen/TSMessages,wjacker/TSMessages,Skalstad2105/TSMessages,modmed/TSMessages,yunzhongyoulong/TSMessages,kennethpu/TSMessages,benzhipeng/TSMessages,OspreyRen/TSMessages,JCheungX/TSMessages,sunyazhou13/TSMessages,MatiMil/TSMessages,alexfeng/TSMessages,ranbeuer/TSMessages,hanhailong/TSMessages,kennethpu/TSMessages,XBeg9/TSMessages,ergunkocak/TSMessages,JCheungX/TSMessages,benzhipeng/TSMessages,KrauseFx/TSMessages,ranbeuer/TSMessages,okuyigaj/TSMessages,JCheungX/TSMessages,kavichen/TSMessages,cnbin/TSMessages,DaGaMs/TSMessages,DaGaMs/TSMessages,winzig/TSMessages,prolificinteractive/TSMessages,ricardopereira/TSMessages,kennethpu/TSMessages,Hotel-Reservation-Service/TSMessages,lijie121210/TSMessages,FrostDigital/TSMessages,lijie121210/TSMessages,baconja/TSMessages,wikimedia/TSMessages,SimplifydigitalLtd/TSMessages,alexfeng/TSMessages,idikic/TSMessages,alexfeng/TSMessages,yunzhongyoulong/TSMessages,instaply/TSMessages,lijie121210/TSMessages,yunzhongyoulong/TSMessages,Skalstad2105/TSMessages,kavichen/TSMessages,sunyazhou13/TSMessages