Using an untyped template parameter in if statement's condition causes compile error

[demotomohiro]

mytests/testuntyped.nim:

template foo(cond: untyped) =
  if cond:
    discard

$ ./bin/nimony c mytests/testuntyped.nim 
bin/nimsem  --isSystem m nifcache/sysvq0asl.1.nif nifcache/sysvq0asl.2.nif nifcache/sysvq0asl.2.idx.nif
bin/nimsem  m nifcache/tes4xq6tf1.1.nif nifcache/tes4xq6tf1.2.nif nifcache/tes4xq6tf1.2.idx.nif
Traceback (most recent call last)
src/nimony/nimsem.nim(116) nimsem
src/nimony/nimsem.nim(113) handleCmdLine
src/nimony/nimsem.nim(50) singleModule
src/nimony/sem.nim(5657) semcheck
src/nimony/sem.nim(765) semStmt
src/nimony/sem.nim(5314) semExpr
src/nimony/nimony_model.nim(3350) semProc
src/nimony/sem.nim(731) semProcBody
src/nimony/sem.nim(714) semStmtsExprImpl
src/nimony/sem.nim(5371) semExpr
src/nimony/sem.nim(3617) semIf
src/nimony/sem.nim(638) semBoolExpr
src/nimony/sembasics.nim(169) buildErr
src/nimony/sembasics.nim(157) buildErr
mytests/testuntyped.nim(3, 5) Error: expected `bool` but got: (untyped)
expected `bool` but got: (untyped)

assert template in syncio module cannot be compiled because of this issue.

[Araq]

For the time being, this should have been:

template foo(cond: bool) =
  if cond:
    discard

So .. an easy fix.