Merge pull request #31 from 0ft3n/master

Fixed support for stacked reforge stones in the GUI

eco-core/core-plugin/src/main/kotlin/com/willfp/reforges/gui/ReforgeGUI.kt

@@ -149,8 +149,7 @@ private class ActivatorSlot(
 
             if (usedStone) {
                 val stone = reforgeStone[player]
-                stone?.itemMeta = null
-                stone?.amount = 0
+                stone?.amount = stone?.amount?.minus(1) ?: 0
                 if (plugin.configYml.getBool("gui.stone-sound.enabled")) {
                     player.playSound(
                         player.location,