pass a source into the builder

for debugging

lib/mom/instruction/message_setup.rb

@@ -27,7 +27,7 @@ module Mom
     # Move method name, frame and arguemnt types from the method to the next_message
     # Get the message from Space and link it.
     def to_risc(compiler)
-      builder = compiler.builder(false)
+      builder = compiler.builder(false, self)
       build_with(builder)
     end
 

lib/mom/instruction/resolve_method.rb

@@ -32,7 +32,7 @@ module Mom
     def to_risc( compiler )
       name_ = @name
       cache_entry_ = @cache_entry
-      builder = compiler.builder(false)
+      builder = compiler.builder(false, self)
       builder.build do
         word << name_
         cache_entry << cache_entry_