Allow "imgexec" with no arguments to boot the file that was loaded with

"kernel".

src/usr/imgmgmt.c

@@ -90,6 +90,22 @@ int imgexec ( struct image *image ) {
 	return image_exec ( image );
 }
 
+/**
+ * Identify the first loaded image
+ *
+ * @ret image		Image, or NULL
+ */
+struct image * imgautoselect ( void ) {
+	struct image *image;
+
+	for_each_image ( image ) {
+		if ( image->flags & IMAGE_LOADED )
+			return image;
+	}
+
+	return NULL;
+}
+
 /**
  * Display status of an image
  *