Clean up some errors/crashes in decompiler (#452)

* fix offline tests, clean up some warnings

* clean up warnings during decomp

* fix remaining crash issues

test/decompiler/reference/all_forward_declarations.gc

@@ -472,6 +472,19 @@
   )
 
 ;; game-h - TODO
+(deftype vector (structure)
+  ((data float 4 :offset-assert 0)
+   (x float :offset 0)
+   (y float :offset 4)
+   (z float :offset 8)
+   (w float :offset 12)
+   (quad uint128 :offset 0)
+   )
+  :method-count-assert 9
+  :size-assert         #x10
+  :flag-assert         #x900000010
+  )
+
 (deftype attack-info (structure)
   ((trans        vector :inline :offset-assert 0)
    (vector       vector :inline :offset-assert 16)
@@ -496,4 +509,47 @@
   (:methods
     (dummy-9 () none 9)
     )
-  )
+  )
+
+;; definition of type quaternion
+(deftype quaternion (structure)
+  ((x    float                       :offset-assert 0)
+   (y    float                       :offset-assert 4)
+   (z    float                       :offset-assert 8)
+   (w    float                       :offset-assert 12)
+   (data float   4 :offset   0)
+   (vec  vector  :inline :offset   0)
+   (quad uint128 :offset   0)
+   )
+  :method-count-assert 9
+  :size-assert         #x10
+  :flag-assert         #x900000010
+  )
+
+(deftype transform (structure)
+  ((trans vector :inline :offset-assert 0)
+   (rot   vector :inline :offset-assert 16)
+   (scale vector :inline :offset-assert 32)
+   )
+  :method-count-assert 9
+  :size-assert         #x30
+  :flag-assert         #x900000030
+  )
+
+;; transformq
+(deftype transformq (transform)
+  ;; this overlays the rot field of transform.
+  ((quat  quaternion :inline :offset 16)
+   )
+  :method-count-assert 9
+  :size-assert         #x30
+  :flag-assert         #x900000030
+  )
+
+
+(declare-type target basic)
+(define-extern *target* target)
+
+(declare-type sidekick basic)
+(define-extern *sidekick* basic)
+