Bump animation frame count from u8 to u16 (#10054)

src/client/tile.h

@@ -271,7 +271,7 @@ struct TileLayer
 	u32 texture_id = 0;
 
 	u16 animation_frame_length_ms = 0;
-	u8 animation_frame_count = 1;
+	u16 animation_frame_count = 1;
 
 	u8 material_type = TILE_MATERIAL_BASIC;
 	u8 material_flags =