Fixed double-registration of basic machine recipes

src/me/mrCookieSlime/Slimefun/Objects/SlimefunItem/multiblocks/Compressor.java

@@ -44,6 +44,11 @@ public class Compressor extends MultiBlockMachine {
 		return recipes.stream().map(items -> items[0]).collect(Collectors.toList());
 	}
 	
+	@Override
+	public void install() {
+		// Do nothing to prevent double-registration of recipes
+	}
+	
 	@Override
 	public void onInteract(Player p, Block b) {
 		Block dispBlock = b.getRelative(BlockFace.DOWN);

src/me/mrCookieSlime/Slimefun/Objects/SlimefunItem/multiblocks/Juicer.java

@@ -44,6 +44,11 @@ public class Juicer extends MultiBlockMachine {
 		return recipes.stream().map(items -> items[0]).collect(Collectors.toList());
 	}
 	
+	@Override
+	public void install() {
+		// Do nothing to prevent double-registration of recipes
+	}
+	
 	@Override
 	public void onInteract(Player p, Block b) {
 		Block dispBlock = b.getRelative(BlockFace.DOWN);

src/me/mrCookieSlime/Slimefun/Objects/SlimefunItem/multiblocks/OreCrusher.java

@@ -48,6 +48,11 @@ public class OreCrusher extends MultiBlockMachine {
 		return recipes.stream().map(items -> items[0]).collect(Collectors.toList());
 	}
 	
+	@Override
+	public void install() {
+		// Do nothing to prevent double-registration of recipes
+	}
+	
 	@Override
 	public void onInteract(Player p, Block b) {
 		Block dispBlock = b.getRelative(BlockFace.DOWN);

src/me/mrCookieSlime/Slimefun/Objects/SlimefunItem/multiblocks/PressureChamber.java

@@ -42,6 +42,11 @@ public class PressureChamber extends MultiBlockMachine {
 		return recipes.stream().map(items -> items[0]).collect(Collectors.toList());
 	}
 	
+	@Override
+	public void install() {
+		// Do nothing to prevent double-registration of recipes
+	}
+	
 	@Override
 	public void onInteract(Player p, Block b) {
 		Block dispBlock = b.getRelative(BlockFace.UP).getRelative(BlockFace.UP);