Update SVModalWebViewController.m
Update SVModalWebViewController.m

use the UINavigationController title for the modal view first
9gag-open-source/SVWebViewController,Kingside/SVWebViewController,mohsinalimat/SVWebViewController,benzhipeng/SVWebViewController,hoowang/SVWebViewController,keslcod/SVWebViewController,hoanganh6491/SVWebViewController,rtsbtx/SVWebViewController,HarrisLee/SVWebViewController,jianwoo/SVWebViewController,Gaoxian/SVWebViewController,bouralu89/SVWebViewController,adonoho/SVWebViewController,inbilin-inc/SVWebViewController,1yvT0s/SVWebViewController,ch-beck/SVWebViewController,TransitApp/SVWebViewController