[Protoobject.pir] changed a few warnings

It's "type object" nowadays. And yes, the whole file might need renaming.

src/classes/Object.pir

@@ -607,7 +607,7 @@ methods, dies if there are none.
 =item !MANY_DISPATCH_HELPER
 
 This is a helper for implementing .+, .? and .*. In the future, it may well be
-the basis of WALK also. It returns all methods we could possible call.
+the basis of WALK also. It returns all methods we could possibly call.
 
 =cut
 

src/parrot/Protoobject.pir

@@ -153,23 +153,23 @@ Indicate that objects in the class are mutable or immutable.
 .namespace ['P6protoobject']
 .sub '' :vtable('get_bool') :method
     .const 'Sub' $P1 = '!FAIL'
-    $P0 = $P1('Use of protoobject as value')
+    $P0 = $P1('Use of type object as value')
     $I0 = istrue $P0
     .return ($I0)
 .end
 
 .namespace ['P6protoobject']
 .sub '' :vtable('get_integer') :method
     .const 'Sub' $P1 = '!FAIL'
-    $P0 = $P1('Use of protoobject as value')
+    $P0 = $P1('Use of type object as value')
     $I0 = $P0
     .return ($I0)
 .end
 
 .namespace ['P6protoobject']
 .sub '' :vtable('get_number') :method
     .const 'Sub' $P1 = '!FAIL'
-    $P0 = $P1('Use of protoobject as value')
+    $P0 = $P1('Use of type object as value')
     $N0 = $P0
     .return ($N0)
 .end