Allow using DBL_MIN

Some compilers specifiy DBL_MIN as long double.
As we do not support long double in neither cil nor goblint itself,
 but want to use DBL_MIN we have no other option than to explicitly check for this one case

src/analyses/base.ml

@@ -731,6 +731,8 @@ struct
       | Const (CReal (_, (FDouble as fkind), Some str)) -> `Float (FD.of_string fkind str) (* prefer parsing from string due to higher precision *)
       | Const (CReal (num, (FFloat as fkind), None))
       | Const (CReal (num, (FDouble as fkind), None)) -> `Float (FD.of_const fkind num)
+      (* this is so far only for DBL_MIN as it is represented as LongDouble although it would fit into a double as well *)
+      | Const (CReal (_, (FLongDouble), Some str)) when str = "2.2250738585072014e-308L" -> `Float (FD.of_string FDouble str)
       (* String literals *)
       | Const (CStr (x,_)) -> `Address (AD.from_string x) (* normal 8-bit strings, type: char* *)
       | Const (CWStr (xs,_) as c) -> (* wide character strings, type: wchar_t* *)