Remove separate block_compiler lists

both in mom and risc method complers
alll just compilers now, all linked
Required to move some code down into callable_compiler but all in all quite little. cleaner

test/mom/test_block_compiler.rb

@@ -16,8 +16,9 @@ module Mom
       assert_equal :main , @risc.method_compilers.callable.name
     end
     def test_main_block_compiler
-      assert_equal :main , @risc.method_compilers.block_compilers.first.in_method.name
-      assert_equal :main_block , @risc.method_compilers.block_compilers.first.callable.name
+      main_block = @risc.method_compilers.find_compiler_name(:main_block)
+      assert_equal :main_block , main_block.callable.name
+      assert_equal :main , main_block.in_method.name
     end
   end
   class TestBlockCompiler2 < MiniTest::Test
@@ -35,8 +36,9 @@ module Mom
       assert_equal :main , @risc.method_compilers.callable.name
     end
     def test_main_block_compiler
-      assert_equal :main , @risc.method_compilers.block_compilers.first.in_method.name
-      assert_equal :main_block , @risc.method_compilers.block_compilers.first.callable.name
+      main_block = @risc.method_compilers.find_compiler_name(:main_block)
+      assert_equal :main_block , main_block.callable.name
+      assert_equal :main , main_block.in_method.name
     end
   end
 end

test/support/compiling.rb

@@ -45,7 +45,7 @@ module VoolCompile
     source = get_preload(preload) + as_main("#{method_input} ; self.main{|val| #{block_input}}")
     mom_col = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_mom( source )
     compiler = mom_col.method_compilers.find_compiler_name(:main)
-    block = compiler.block_compilers.first
+    block = mom_col.method_compilers.find_compiler_name(:main_block)
     assert block
     block.mom_instructions.next
   end