Check for @:autoBuild only after checking for embed data.

If we ever decide to handle the case of the embed functions being called for non-classes (meaning `getLocalClass()` would return null), we'd handle it in `embedData()`. Therefore `embedData()` should happen first.

src/lime/_internal/macros/AssetsMacro.hx

@@ -28,6 +28,9 @@ class AssetsMacro
 
 	macro public static function embedBytes():Array<Field>
 	{
+		var fields = embedData(":file");
+		if (fields == null) return null;
+
 		for (autoBuild in Context.getLocalClass().get().meta.extract(":autoBuild"))
 		{
 			switch (autoBuild.params[0])
@@ -38,9 +41,6 @@ class AssetsMacro
 			}
 		}
 
-		var fields = embedData(":file");
-		if (fields == null) return null;
-
 		var superCall = Context.defined("html5") ? macro super(bytes.b.buffer)
 			: Context.defined("hl") ? macro super(bytes.b, bytes.length)
 			: macro super(bytes.length, bytes.b);