Dir out must be empty if no equals in (#359)

* Dir out must be empty if no equals in

* defaults to input

* remove space

Author: DavidGOrtega

iterative/resource_task.go

@@ -284,13 +284,12 @@ func resourceTaskBuild(ctx context.Context, d *schema.ResourceData, m interface{
 		directory = storage["input"].(string)
 
 		directory_out = storage["output"].(string)
-		if directory_out == "" {
-			directory_out = directory
+		if directory_out != "" && !isOutputValid(directory_out) {
+			return nil, errors.New("output directory " + directory_out + " is not empty!")
 		}
 	}
-
-	if directory_out != "" && !isOutputValid(directory_out) {
-		return nil, errors.New("output directory " + directory_out + " is not empty!")
+	if directory_out == "" {
+		directory_out = directory
 	}
 
 	t := common.Task{