[Bug c/67925] docs lie about being unable to inline function call before definition

[arkadiusz at drabczyk dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67925

--- Comment #4 from Arkadiusz Drabczyk <arkadiusz at drabczyk dot org> ---
Created attachment 36488
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36488&action=edit
suggested patch