[FIX] Index may not be less than 0
[FIX] Index may not be less than 0

In some cases its -1 when moving folders or files around in the file
system and that causes an unwanted exception. This is maybe a dirty fix.

VoidPointerAB/n2cms,EzyWebwerkstaden/n2cms,nicklv/n2cms,n2cms/n2cms,nicklv/n2cms,nimore/n2cms,DejanMilicic/n2cms,DejanMilicic/n2cms,VoidPointerAB/n2cms,nimore/n2cms,n2cms/n2cms,SntsDev/n2cms,SntsDev/n2cms,DejanMilicic/n2cms,nicklv/n2cms,bussemac/n2cms,EzyWebwerkstaden/n2cms,bussemac/n2cms,DejanMilicic/n2cms,bussemac/n2cms,VoidPointerAB/n2cms,nimore/n2cms,VoidPointerAB/n2cms,bussemac/n2cms,n2cms/n2cms,SntsDev/n2cms,bussemac/n2cms,n2cms/n2cms,nimore/n2cms,EzyWebwerkstaden/n2cms,EzyWebwerkstaden/n2cms,nicklv/n2cms,EzyWebwerkstaden/n2cms,SntsDev/n2cms,nicklv/n2cms