fixes ivar collection

lib/vool/statements/assignment_statement.rb

@@ -12,5 +12,9 @@ module Vool
   class LocalAssignment < Assignment
   end
   class InstanceAssignment < Assignment
+    # used to collect type information
+    def add_ivar( array )
+      array << @name
+    end
   end
 end

test/vool/compilers/test_variables.rb

@@ -23,7 +23,7 @@ module Vool
         assert_equal :var , vars.first
       end
 
-      def ttest_assign_collect
+      def test_assign_collect
         vars = compile( "@var = 5" )
         assert_equal :var , vars.first
       end