current_function_has_computed_jump defined twice

[Andreas Schwab]

There are two definitions of current_function_has_computed_jump in
function.c, with differing explanatory comments, where the first one is
actually wrong (it is already computed during rtl generation, see
expand_computed_goto).

-- 
Andreas Schwab                                      "And now for something
schwab@issan.cs.uni-dortmund.de                      completely different"
schwab@gnu.org