null check for ft.remove, hopefully solve BackStackRecord.java:651 npe
null check for ft.remove, hopefully solve BackStackRecord.java:651 npe

alexws54tk/wigle-wifi-wardriving,alexws54tk/wigle-wifi-wardriving,rksh/wigle-wifi-wardriving,alexws54tk/wigle-wifi-wardriving,wiglenet/wigle-wifi-wardriving,wiglenet/wigle-wifi-wardriving,bobzilladev/wigle-wifi-wardriving,rksh/wigle-wifi-wardriving,rksh/wigle-wifi-wardriving,DEVPAR/wigle-wifi-wardriving,bobzilladev/wigle-wifi-wardriving,DEVPAR/wigle-wifi-wardriving,wiglenet/wigle-wifi-wardriving,DEVPAR/wigle-wifi-wardriving,bobzilladev/wigle-wifi-wardriving