Fixes #2584

Better compiler errors for accessing undeclared fields, calling undeclared
procedures and procedure fields.

tests/enum/tenumitems.nim

@@ -1,6 +1,6 @@
 discard """
   line: 7
-  errormsg: "undeclared identifier: 'items'"
+  errormsg: "attempting to call undeclared procedure: 'items'"
 """
 
 type a = enum b,c,d

tests/misc/tissue710.nim

@@ -1,7 +1,7 @@
 discard """
   file: "tissue710.nim"
   line: 8
-  errorMsg: "undeclared identifier: '||'"
+  errorMsg: "attempting to call undeclared procedure: '||'"
 """
 var sum = 0
 for x in 3..1000:

tests/misc/tnoop.nim

@@ -1,7 +1,7 @@
 discard """
   file: "tnoop.nim"
   line: 11
-  errormsg: "undeclared identifier: 'a'"
+  errormsg: "attempting to call undeclared procedure: 'a'"
 """
 
 

tests/modules/topaque.nim

@@ -1,16 +1,16 @@
 discard """
   file: "topaque.nim"
   line: 16
-  errormsg: "undeclared identifier: \'buffer\'"
+  errormsg: "undeclared field: \'buffer\'"
 """
 # Test the new opaque types
 
-import 
+import
   mopaque
-  
+
 var
   L: TLexer
-  
+
 L.filename = "ha"
 L.line = 34
 L.buffer[0] = '\0' #ERROR_MSG undeclared field: 'buffer'

tests/tuples/twrongtupleaccess.nim

@@ -1,7 +1,7 @@
 discard """
   file: "twrongtupleaccess.nim"
   line: 9
-  errormsg: "undeclared identifier: \'setBLAH\'"
+  errormsg: "attempting to call undeclared procedure field: \'setBLAH\'"
 """
 # Bugfix