Dont display interior of glasslike_framed node when its not defined.

Fixes https://github.com/minetest/minetest/issues/1514

diff --git a/src/content_mapblock.cpp b/src/content_mapblock.cpp
index 7708d0e76f70675b22e44411298c5cc23a692f1c..f5b49c662e77d6dd8bb62330267d9ded9d8add58 100644 (file)
--- a/src/content_mapblock.cpp
+++ b/src/content_mapblock.cpp
@@ -946,7 +946,7 @@ void mapblock_mesh_generate_special(MeshMakeData *data,
                                makeCuboid(&collector, box, &glass_tiles[i], 1, c, txc2);
                        }
 
-                       if (param2 > 0){
+                       if (param2 > 0 && f.special_tiles[0].texture) {
                                // Interior volume level is in range 0 .. 63,
                                // convert it to -0.5 .. 0.5
                                float vlev = (((float)param2 / 63.0 ) * 2.0 - 1.0);