Importing invalid SKR file might overflow the stack buffer

Importing invalid SKR file might overflow the stack buffer

If an invalid SKR file is imported, reading the time from the token
buffer might overflow the buffer on the local stack.  This has been
fixed by removing the intermediate buffer and parsing the lexer token
directly.

(cherry picked from commit 8ab4827a0c35128a88212237395f388c17e9ff26)