[decomp] minor type cleanup (#874)

* clean up some types

* clean up settings

test/decompiler/reference/engine/game/task/process-taskable_REF.gc

@@ -643,7 +643,7 @@
     (push-setting!
      *setting-control*
      self
-     (the-as (function object object object object object) 'music-volume)
+     'music-volume
      'rel
      (-> *setting-control* current music-volume-movie)
      0
@@ -651,7 +651,7 @@
     (push-setting!
      *setting-control*
      self
-     (the-as (function object object object object object) 'sfx-volume)
+     'sfx-volume
      'rel
      (-> *setting-control* current sfx-volume-movie)
      0
@@ -659,7 +659,7 @@
     (push-setting!
      *setting-control*
      self
-     (the-as (function object object object object object) 'ambient-volume)
+     'ambient-volume
      'rel
      (-> *setting-control* current ambient-volume-movie)
      0
@@ -1796,7 +1796,7 @@
      (push-setting!
       *setting-control*
       self
-      (the-as (function object object object object object) 'process-mask)
+      'process-mask
       'set
       0.0
       (-> self mask-to-clear)
@@ -1804,7 +1804,7 @@
      (push-setting!
       *setting-control*
       self
-      (the-as (function object object object object object) 'movie)
+      'movie
       (process->ppointer self)
       0.0
       0
@@ -1813,7 +1813,7 @@
       (push-setting!
        *setting-control*
        self
-       (the-as (function object object object object object) 'border-mode)
+       'border-mode
        (-> self border-value)
        0.0
        0