amicommon: only include exec helpers when compiling for v2.0 in athreads

git-svn-id: trunk@44743 -

rtl/amicommon/athreads.pp

@@ -40,11 +40,13 @@ uses
 {$include doslibf.inc}
 
 {$ifdef cpum68k}
-{$if defined(amiga_v1_0_only) or defined(amiga_v1_2_only)}
+{$if defined(amiga_v1_0_only) or defined(amiga_v1_2_only) or defined(amiga_v2_0_only)}
 {$include legacyexech.inc}
+{$if not defined(amiga_v2_0_only)}
 {$include legacydosh.inc}
 {$endif}
 {$endif}
+{$endif}
 
 {$ENDIF}