move allowed_lengths for music macros out

This moves the allowed_lengths setting out of the preprocessor. Special
cases should not be hardcoded in the preprocessor.

preprocessor.py

@@ -490,12 +490,6 @@ def macro_translator(macro, token, line):
     else:
         allowed_lengths = [allowed_length]
 
-    if macro.macro_name == "notetype":
-        allowed_lengths = [1,2]
-    elif macro.macro_name == "togglenoise" \
-    or macro.macro_name == "sfxtogglenoise":
-        allowed_lengths = [0,1]
-
     assert len(params) in allowed_lengths, \
            "mismatched number of parameters on this line: " + \
            original_line
@@ -589,4 +583,4 @@ def read_line(l):
             sys.stdout.write(comment)
 
 for l in sys.stdin:
-    read_line(l)
+    read_line(l)