Fix @AfterMapping scope issue (close DoclerLabs/hexMachina#239)

Author: aliokan

src/hex/di/mapping/MappingChecker.hx

@@ -173,7 +173,7 @@ class MappingChecker
 										hasAfterMappingMeta = hasAfterMappingMeta || true;
 										//Append
 										a.push( exp );
-										e.expr = EBlock( a );
+										e.expr = (macro @:mergeBlock $b{a}).expr;
 									case _:
 										//trace( new haxe.macro.Printer().printExpr( e ) );
 										ExprTools.iter( e, findAfterMappingMeta );

test/hex/di/mock/owner/DependencyOwnerAfterMapping.hx

@@ -134,6 +134,8 @@ class DependencyOwnerChildWithAfterMappingWrapped extends SuperDependencyOwner
 			if( arg == 3 )
 			{
 				@AfterMapping
+				var i = 0;
+				i++;
 				id = try _injector.getInstance( Interface, "id" ) catch(e:Exception) null;
 				id2 = try _injector.getInstance( Interface, "id2" ) catch(e:Exception) null;
 			}