fixes --gc:none regression; made some tests green

tests/misc/tissue710.nim

@@ -1,7 +1,7 @@
 discard """
   file: "tissue710.nim"
   line: 8
-  errorMsg: "expression '||' cannot be called"
+  errorMsg: "undeclared identifier: '||'"
 """
 var sum = 0
 for x in 3..1000:

tests/misc/tnoop.nim

@@ -1,12 +1,11 @@
 discard """
   file: "tnoop.nim"
   line: 11
-  errormsg: "expression \'a()\' cannot be called"
+  errormsg: "undeclared identifier: 'a'"
 """
-# Tests the new check in the semantic pass
+
 
 var
   a: int
 
-a()  #ERROR_MSG expression 'a()' cannot be called
-
+a()