Fix compilation with XE5 and earlier (no StrToUInt64Def)

Author: vincentparrett

Source/DUnitX.Utils.pas

@@ -1214,9 +1214,11 @@ function ConvStr2Int(const ASource: TValue; ATarget: PTypeInfo; out AResult: TVa
 
 function ConvStr2Ord(const ASource: TValue; ATarget: PTypeInfo; out AResult: TValue): Boolean;
 begin
+  {$IFDEF DELPHI_XE6_UP}
   if ATarget = System.TypeInfo(UInt64) then
     AResult := TValue.FromOrdinal(ATarget, StrToUInt64Def(ASource.AsString, 0))
   else
+  {$ENDIF}
     AResult := TValue.FromOrdinal(ATarget, StrToInt64Def(ASource.AsString, 0));
   Result := True;
 end;

Source/DUnitX.inc

@@ -74,6 +74,11 @@
   {$DEFINE DELPHI_XE4_UP}
 {$IFEND}
 
+{$IF CompilerVersion > 26.0} // XE6 up
+  {$DEFINE DELPHI_XE6_UP}
+{$IFEND}
+
+
 
 {$IF CompilerVersion > 28.0} // XE8 up
   {$DEFINE DELPHI_XE8_UP}