Skip EPF_TABLE_ONLY fields with --list -N

When listing fields with -N (names only), also skip fields with the
EPF_TABLE_ONLY flag. (Skipping fields without -N is handled in libs,
in the as_string() method).

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

userspace/engine/falco_engine.cpp

@@ -136,6 +136,12 @@ void falco_engine::list_fields(std::string &source, bool verbose, bool names_onl
 			{
 				for(auto &field : fld_class.fields)
 				{
+					// Skip fields with the EPF_TABLE_ONLY flag.
+					if(field.tags.find("EPF_TABLE_ONLY") != field.tags.end())
+					{
+						continue;
+					}
+
 					printf("%s\n", field.name.c_str());
 				}
 			}