fix some trivial errors in the test suite and some more regressions caused by tyTypeDesc[tyNone]

tests/generics/tgenericlambda.nim

@@ -1,5 +1,5 @@
 discard """
-  output: "10\n10"
+  output: "10\n10\n1\n2\n3"
 """
 
 proc test(x: proc (a, b: int): int) =
@@ -8,3 +8,11 @@ proc test(x: proc (a, b: int): int) =
 test(proc (a, b): auto = a + b)
 
 test do (a, b) -> auto: a + b
+
+proc foreach[T](s: seq[T], body: proc(x: T)) =
+  for e in s:
+    body(e)
+
+foreach(@[1,2,3]) do (x):
+  echo x
+