dont create yield block for childless component

src/generators/dom/preprocess.js

@@ -131,6 +131,7 @@ const preprocessors = {
 
 		const isComponent = generator.components.has( node.name ) || node.name === ':Self';
 
+		if ( node.children.length ) {
 			if ( isComponent ) {
 				const name = block.getUniqueName( ( node.name === ':Self' ? generator.name : node.name ).toLowerCase() );
 
@@ -148,6 +149,7 @@ const preprocessors = {
 				preprocessChildren( generator, block, node.children );
 			}
 		}
+	}
 };
 
 preprocessors.RawMustacheTag = preprocessors.MustacheTag;