Fix burning entity animation.

The parameters for the flames sprite were incorrect, causing the reverse
side of the sprite to appear as an opaque black rectangle.  Use the
correct incantation.

mods/ENTITIES/mcl_burning/init.lua

@@ -70,13 +70,8 @@ minetest.register_entity("mcl_burning:fire", {
 		collisionbox = {0, 0, 0, 0, 0, 0},
 		visual = "upright_sprite",
 		textures = {
-			name = "mcl_burning_entity_flame_animated.png",
-			animation = {
-				type = "vertical_frames",
-				aspect_w = 16,
-				aspect_h = 16,
-				length = 1.0,
-			},
+			"mcl_burning_entity_flame_animated.png",
+			"mcl_burning_entity_flame_animated.png"
 		},
 		spritediv = {x = 1, y = mcl_burning.animation_frames},
 		pointable = false,