bin/show freezes on loading an `uos_rgb` file when a line starts with `NaN`

[josch]

bin/show freezes on loading an uos_rgb file when a line starts with NaN
Used bin/show -f uos_rgb -s 0 -e 0 --no-fog -c pathToFile
CPU usage is extremely high. Endless loop?

Reported by: seth-dracam

Original Ticket: slam6d/tickets/6

[josch]

Addition: Console prints "Creating display ocrees.." then nothing

Original comment by: seth-dracam