Avoid UB pointer arithmetic in T1 parsing
Check that the parser cursor is not already at the limit before creating a pointer to one after it. This allows for safely skipping the 'white' only if it is actually present. Bug: https://crbug.com/1258839
Check that the parser cursor is not already at the limit before creating a pointer to one after it. This allows for safely skipping the 'white' only if it is actually present. Bug: https://crbug.com/1258839