SystemTools: Fix type of GetLineFromStream
Use std::string::size_type instead of long for the GetLineFromStream sizeLimit argument. Adjust the implementation of GetLineFromStream since std::string::size_type is unsigned.
Edited by Alexey Edelev
Use std::string::size_type instead of long for the GetLineFromStream sizeLimit argument. Adjust the implementation of GetLineFromStream since std::string::size_type is unsigned.