Fix fgetln() in libbsd to actually set it's length pointer argument
|Reported by:||joshe||Owned by:||nobody|
|Has a Patch:||no||Platform:||All|
fgetln() takes a size_t pointer as it's second argument, ostensibly to communicate the length of the returned string. Haiku's fgetln() implementation however ignores the second argument completely. Attached is a patch which corrects this.