catch a similar nil condition in the node breaker

diff --git a/node_breaker.lua b/node_breaker.lua
index 23ff533b46a82dfbe7b921741b7fb235b756d92e..bffb27cb9f21d5b8f418dfbcc3ffabf9d1e2fdfc 100644 (file)
--- a/node_breaker.lua
+++ b/node_breaker.lua
@@ -102,6 +102,8 @@ end
 
 function break_node (pos, facedir)
        --locate the outgoing velocity, front, and back of the node via facedir_to_dir
+       if type(facedir) ~= "number" or facedir < 0 or facedir > 23 then return end
+
        local vel = minetest.facedir_to_dir(facedir);
        local front = {x=pos.x - vel.x, y=pos.y - vel.y, z=pos.z - vel.z}
        local back = {x=pos.x + vel.x, y=pos.y + vel.y, z=pos.z + vel.z}