appmodel: fix oneliner steps being ignored

[MrAnno]

For example,

  step [sname] { $MESSAGE += " bello"; };

generated (transforms it into a comment):

  # step: sname         $MESSAGE += " bello";

[bazsi]

Just double check if location tracking still works properly

[MrAnno]

I don't fully understand what you mean.

Errors are reported as before (line numbers within the transformation are incorrect, but that's not because of my patch):

Error parsing filterx expression: syntax error, unexpected KW_BREAK, expecting ';'

In parser generator app-transform:14:9-14:14:
9
10      #Start Application trans
11          case 'trans':
12              # step: sname
13               idfj
14---->         break;
14---->         ^^^^^
15
16      #End Application trans
17              }
18          };
19      }

Included from /home/anno/dev/x/syslog/install/etc/syslog-ng.conf:42:5-42:65:
37          filterx {
38              declare appname = "trans";
39          };
40
41          parser { app-parser(topic(tttopic));
42---->     app-transform(filterx-app-variable(appname) flavour(ttopic)); };
42---->     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
43
44          destination { stdout(); };
45      };