fix the filtering of void params in procs' signatures

tests/reject/mbind4.nim

@@ -1,9 +0,0 @@
-# Module A
-var 
-  lastId = 0
-
-template genId*: expr =
-  inc(lastId)
-  lastId
-
-

tests/reject/tactiontable2.nim

@@ -5,23 +5,23 @@ discard """
 
 import tables
 
-proc action1(arg: string) = 
+proc action1(arg: string) =
   echo "action 1 ", arg
 
-proc action2(arg: string) = 
+proc action2(arg: string) =
   echo "action 2 ", arg
 
-proc action3(arg: string) = 
+proc action3(arg: string) =
   echo "action 3 ", arg
 
-proc action4(arg: string) = 
+proc action4(arg: string) =
   echo "action 4 ", arg
 
 const
   actionTable = {
-    "A": action1, 
-    "B": action2, 
-    "C": action3, 
+    "A": action1,
+    "B": action2,
+    "C": action3,
     "D": action4}.toTable
 
 actionTable["C"]("arg")

tests/reject/tbind4.nim

@@ -1,13 +0,0 @@
-discard """
-  file: "mbind4.nim"
-  line: 6
-  errormsg: "undeclared identifier: \'lastId\'"
-"""
-# Module B
-import mbind4
-
-echo genId()
-
-
-
-

tests/reject/teffects1.nim

@@ -1,5 +1,5 @@
 discard """
-  line: 1840
+  line: 1847
   file: "system.nim"
   errormsg: "can raise an unlisted exception: ref EIO"
 """