make tests green again

lib/pure/nimtracker.nim

@@ -9,7 +9,7 @@
 
 ## Memory tracking support for Nim.
 
-when not defined(memTracker):
+when not defined(memTracker) and not isMainModule:
   {.error: "Memory tracking support is turned off!".}
 
 {.push memtracker: off.}
@@ -31,7 +31,8 @@ template sbind(x: int; value) =
     if ret != SQLITE_OK:
       quit "could not bind value"
 
-proc logEntries(log: TrackLog) {.nimcall.} =
+when defined(memTracker):
+  proc logEntries(log: TrackLog) {.nimcall.} =
     for i in 0..log.count-1:
       var success = false
       let e = log.data[i]
@@ -72,6 +73,7 @@ if sqlite3.open("memtrack.db", dbHandle) == SQLITE_OK:
   const query = "INSERT INTO tracking(op, address, size, file, line) values (?, ?, ?, ?, ?)"
   if prepare_v2(dbHandle, query,
       query.len, insertStmt, nil) == SQLITE_OK:
+    when defined(memTracker):
       setTrackLogger logEntries
   else:
     quit "could not prepare statement B " & $sqlite3.errmsg(dbHandle)