Fixed #958

build.gradle

@@ -27,7 +27,7 @@ allprojects{
         appName = 'Mindustry'
         gdxVersion = '1.9.10'
         roboVMVersion = '2.3.8-SNAPSHOT'
-        steamworksVersion = 'f9ed19bbddd71f07999ca8f0ef354c04938aca41'
+        steamworksVersion = 'ea1cd5096e4acd18564eb0d946e0cc0c0722b481'
         arcHash = null
 
         debugged = {

core/src/io/anuke/mindustry/graphics/OverlayRenderer.java

@@ -63,6 +63,7 @@ public class OverlayRenderer{
 
             if(ui.hudfrag.blockfrag.currentCategory == Category.upgrade){
                 for(Tile mechpad : indexer.getAllied(player.getTeam(), BlockFlag.mechPad)){
+                    if(!(mechpad.block() instanceof MechPad)) continue;
                     if(!rect.setSize(Core.camera.width * 0.9f, Core.camera.height * 0.9f)
                             .setCenter(Core.camera.position.x, Core.camera.position.y).contains(mechpad.x, mechpad.y)){