Use exact type for temporary variable wrapping parameters with defaul…

…t args and compactdefaultargs

When wrapping a default argument such as 'const bool& x = true'
a variable with the exact same type, such as:

  bool const &arg2_defvalue = true;

is now used in the generated code instead of a dereferenced type:

  bool arg2_defvalue = true;

This can still be used for the wrapped argument without any other
changes:

  bool *arg2 = (bool *) &arg2_defrvalue;

and the lifetimes are still the same for the temporary variable.

Works around some typedef issues for enum classes introduced in the
previous commit in the cpp11_strongly_typed_enumerations testcase,
when wrapping a parameter 'const PRINT_SETUP& e = PRINT_SETUP::TO_CONSOLE'
The temporary variable being generated became:

  enum MyClass::PRINT_SETUP arg2_defvalue = MyClass::PRINT_SETUP::TO_CONSOLE ;

The enum in the type is wrong for an enum class. Now the original type
is used:

  MyClass::PRINT_SETUP const &arg2_defvalue = MyClass::PRINT_SETUP::TO_CONSOLE ;

Source/Swig/cwrap.c

@@ -240,55 +240,27 @@ int Swig_cargs(Wrapper *w, ParmList *p) {
       int tycode = SwigType_type(type);
       if (tycode == T_REFERENCE) {
 	if (pvalue) {
-	  SwigType *tvalue;
-	  String *defname, *defvalue, *rvalue, *qvalue;
-	  rvalue = SwigType_typedef_resolve_all(pvalue);
-	  qvalue = SwigType_typedef_qualified(rvalue);
-	  defname = NewStringf("%s_defvalue", lname);
-	  tvalue = Copy(type);
-	  SwigType_del_reference(tvalue);
-	  tycode = SwigType_type(tvalue);
-	  if (tycode != T_USER) {
-	    /* plain primitive type, we copy the def value */
-	    String *lstr = SwigType_lstr(tvalue, defname);
-	    defvalue = NewStringf("%s = %s", lstr, qvalue);
-	    Delete(lstr);
-	  } else {
-	    /* user type, we copy the reference value */
-	    String *str = SwigType_str(type, defname);
-	    defvalue = NewStringf("%s = %s", str, qvalue);
-	    Delete(str);
-	  }
+	  String *rvalue = SwigType_typedef_resolve_all(pvalue);
+	  String *qvalue = SwigType_typedef_qualified(rvalue);
+	  String *defname = NewStringf("%s_defvalue", lname);
+	  String *str = SwigType_str(pt, defname);
+	  String *defvalue = NewStringf("%s = %s", str, qvalue);
 	  Wrapper_add_localv(w, defname, defvalue, NIL);
-	  Delete(tvalue);
+	  Delete(str);
 	  Delete(rvalue);
 	  Delete(qvalue);
 	  Delete(defname);
 	  Delete(defvalue);
 	}
       } else if (tycode == T_RVALUE_REFERENCE) {
 	if (pvalue) {
-	  SwigType *tvalue;
-	  String *defname, *defvalue, *rvalue, *qvalue;
-	  rvalue = SwigType_typedef_resolve_all(pvalue);
-	  qvalue = SwigType_typedef_qualified(rvalue);
-	  defname = NewStringf("%s_defrvalue", lname);
-	  tvalue = Copy(type);
-	  SwigType_del_rvalue_reference(tvalue);
-	  tycode = SwigType_type(tvalue);
-	  if (tycode != T_USER) {
-	    /* plain primitive type, we copy the def value */
-	    String *lstr = SwigType_lstr(tvalue, defname);
-	    defvalue = NewStringf("%s = %s", lstr, qvalue);
-	    Delete(lstr);
-	  } else {
-	    /* user type, we copy the reference value */
-	    String *str = SwigType_str(type, defname);
-	    defvalue = NewStringf("%s = %s", str, qvalue);
-	    Delete(str);
-	  }
+	  String *rvalue = SwigType_typedef_resolve_all(pvalue);
+	  String *qvalue = SwigType_typedef_qualified(rvalue);
+	  String *defname = NewStringf("%s_defrvalue", lname);
+	  String *str = SwigType_str(pt, defname);
+	  String *defvalue = NewStringf("%s = %s", str, qvalue);
 	  Wrapper_add_localv(w, defname, defvalue, NIL);
-	  Delete(tvalue);
+	  Delete(str);
 	  Delete(rvalue);
 	  Delete(qvalue);
 	  Delete(defname);