add $R- to avoid errors

tests/tbs/tbs0084.pp

@@ -1,5 +1,7 @@
+{$R-}
 
 { Basic Pascal principles gone done the drain... !!!! }
+
 var
  v: word;
  w: shortint;

tests/tbs/tbs0106.pp

@@ -1,3 +1,4 @@
+{$R-}
 
 { I think this now occurs with most type casting... }
 { I think type casting is no longer considered??     }

tests/tbs/tbs0258.pp

@@ -2,6 +2,7 @@ program test_set;
 
 uses erroru;
 
+{$R-}
 
 procedure test;
 

tests/tbs/tbs0290.pp

@@ -1,3 +1,6 @@
+{ $R+ would give compile time errors }
+{$R-}
+
 Program bug0290;
 
 var i,j : integer;