fixes a multimethod regression

tests/metatype/tautonotgeneric.nim

@@ -1,15 +1,24 @@
 discard """
-  output: "wof!"
+  output: '''wof!
+wof!'''
 """
 
 # bug #1659
 type Animal = ref object {.inheritable.}
 type Dog = ref object of Animal
 
-method say(a: Animal): auto = "wat!"
+method say(a: Animal): auto {.base.} = "wat!"
 method say(a: Dog): auto = "wof!"
 
 proc saySomething(a: Animal): auto = a.say()
 
+
+method ec(a: Animal): auto {.base.} = echo "wat!"
+method ec(a: Dog): auto = echo "wof!"
+
+proc ech(a: Animal): auto = a.ec()
+
+
 var a = Dog()
 echo saySomething(a)
+ech a