Fix: Incorrect handling of alternate sprites in nml pre-processing

For lines directly from a pnml, rather than an included pnml, the result from checking for alternate sprites for a line was not used.

Author: zephyris

templates/nml_preprocessor.py

@@ -141,7 +141,7 @@ def handle_alternates(line):
               print("File not found:", os.path(base_path, import_path))
           else:
             include_line = handle_alternates(line)
-            nml.write(line + "\n")
+            nml.write(include_line + "\n")
     except FileNotFoundError:
       print("File not found:", sys.argv[1] + ".pnml")