Additional fix for 1989/fubar

My original fix no longer worked, at least with clang in some systems,
because of more strictness in the compiler wrt implicit ints. As the
code does not use the Makefile but rather 'cc' (and in an unusual way)
'main()' now has an explicit int.

Also, what was previously documented as a bug to be fixed has been
changed to INABIAF as it was documented already. Thus it should not be
fixed. In fact the judges originally noted that if one specifies the
triggering input they should expect an infinite loop and compilation
failure.

bugs.md

@@ -567,16 +567,14 @@ and does not crash.
 ## 1989/fubar
 </div>
 
-### STATUS: known bug - please help us fix
+### STATUS: INABIAF - please **DO NOT** fix
 ### Source code: [1989/fubar/fubar.c](%%REPO_URL%%/1989/fubar/fubar.c)
 ### Information: [1989/fubar/index.html](1989/fubar/index.html)
 
 If you use either `fubar` or `ouroboros.c` (it's executable, see index.html for
 details) with a number < 0 or larger than, say 20, it's very likely that the
-program will turn into an infinite loop trying to compile code with syntax
-errors.
-
-If you want to try and fix this (mis)feature, you are welcome to try.
+program will turn into an infinite loop trying to compile code and end up with
+with syntax errors. As this was documented it is not a bug to be fixed.
 
 
 <div id="1989_robison">