fix inital main (again)

stop even compiling a fake main if a real exists (in builtin)
previous version was still buggy: using builting methods types (especially locals) even comiled version had different

lib/mom/mom_compiler.rb

@@ -3,12 +3,7 @@ module Mom
     attr_reader :method_compilers
 
     def initialize(compilers = [])
-      @method_compilers = compilers
-      Risc::Builtin.boot_functions.each do |boot_comp|
-        next if @method_compilers.find{|comp| comp.method == boot_comp.method }        
-        @method_compilers << boot_comp
-      end
-
+      @method_compilers = compilers + Risc::Builtin.boot_functions
     end
 
     # collects constants from all compilers into one array