Fixing self type creation

When compiling a classs, we pick up all instance variables.
Now that conditions and returns can be calls, that was broken, now fixed

test/mom/test_return_dynamic.rb

@@ -7,19 +7,19 @@ module Risc
     def setup
       super
       @input = "return @a.div4"
-      @expect = [LoadConstant, SlotToReg, SlotToReg, SlotToReg, SlotToReg, #5
-                 OperatorInstruction, IsZero, SlotToReg, SlotToReg, SlotToReg, #10
-                 LoadConstant, RegToSlot, LoadConstant, LoadConstant, SlotToReg, #15
-                 SlotToReg, Label, LoadConstant, OperatorInstruction, IsZero, #20
-                 SlotToReg, OperatorInstruction, IsZero, SlotToReg, Branch, #25
-                 Label, LoadConstant, SlotToReg, Transfer, Syscall, #30
-                 Transfer, Transfer, SlotToReg, RegToSlot, Label, #35
-                 RegToSlot, Label, LoadConstant, SlotToReg, LoadConstant, #40
-                 SlotToReg, SlotToReg, RegToSlot, RegToSlot, RegToSlot, #45
-                 RegToSlot, SlotToReg, SlotToReg, SlotToReg, RegToSlot, #50
-                 LoadConstant, SlotToReg, RegToSlot, SlotToReg, LoadConstant, #55
-                 SlotToReg, DynamicJump, Label, SlotToReg, SlotToReg, #60
-                 RegToSlot, SlotToReg, SlotToReg, RegToSlot, Branch] #65
+      @expect = [LoadConstant, SlotToReg, SlotToReg, SlotToReg, SlotToReg, #4
+                 OperatorInstruction, IsZero, SlotToReg, SlotToReg, SlotToReg, #9
+                 LoadConstant, RegToSlot, LoadConstant, LoadConstant, SlotToReg, #14
+                 SlotToReg, Label, LoadConstant, OperatorInstruction, IsZero, #19
+                 SlotToReg, OperatorInstruction, IsZero, SlotToReg, Branch, #24
+                 Label, LoadConstant, SlotToReg, Transfer, Syscall, #29
+                 Transfer, Transfer, SlotToReg, RegToSlot, Label, #34
+                 RegToSlot, Label, LoadConstant, SlotToReg, LoadConstant, #39
+                 SlotToReg, SlotToReg, RegToSlot, RegToSlot, RegToSlot, #44
+                 RegToSlot, SlotToReg, SlotToReg, SlotToReg, RegToSlot, #49
+                 LoadConstant, SlotToReg, RegToSlot, SlotToReg, LoadConstant, #54
+                 SlotToReg, DynamicJump, Label, SlotToReg, RegToSlot, #59
+                 Branch] #64
     end
 
     def test_return_instructions
@@ -27,7 +27,7 @@ module Risc
     end
     def test_function_return
       produced = produce_body
-      assert_equal Branch , produced.next(64).class
+      assert_equal Branch , produced.next(60).class
     end
     def test_cache_check
       produced = produce_body