Pause MCMusic when "Ping" packet is received

This prevents Minecraft's music from playing at the same time as
user-provided battle/silly music.

src/main/java/com/burnedkirby/TurnBasedMinecraft/client/BattleMusic.java

@@ -180,7 +180,7 @@ public class BattleMusic
         if(initialized && next != null)
         {
             logger.debug("play called with file " + next.getName() + " and vol " + volume);
-        	Minecraft.getInstance().getSoundManager().pause();
+            TurnBasedMinecraftMod.proxy.pauseMCMusic();
             String suffix = next.getName().substring(next.getName().length() - 3).toLowerCase();
             if(suffix.equals("mid") && sequencer != null)
             {
@@ -362,7 +362,7 @@ public class BattleMusic
         }
         if(resumeMCSounds)
         {
-            Minecraft.getInstance().getSoundManager().resume();
+            TurnBasedMinecraftMod.proxy.resumeMCMusic();
         }
         isPlaying = false;
     }

src/main/java/com/burnedkirby/TurnBasedMinecraft/client/ClientProxy.java

@@ -1483,4 +1483,14 @@ public class ClientProxy extends CommonProxy {
     public void showClientConfigGui() {
         Minecraft.getInstance().setScreen(new ClientConfigGui());
     }
+
+    @Override
+    public void pauseMCMusic() {
+        Minecraft.getInstance().getSoundManager().pause();
+    }
+
+    @Override
+    public void resumeMCMusic() {
+        Minecraft.getInstance().getSoundManager().resume();
+    }
 }

src/main/java/com/burnedkirby/TurnBasedMinecraft/common/CommonProxy.java

@@ -175,4 +175,7 @@ public class CommonProxy
     public <MSG> void handlePacket(MSG msg,CustomPayloadEvent.Context ctx) {}
 
     public void showClientConfigGui() {}
+
+    public void pauseMCMusic() {}
+    public void resumeMCMusic() {}
 }

src/main/java/com/burnedkirby/TurnBasedMinecraft/common/networking/PacketBattlePing.java

@@ -52,6 +52,7 @@ public class PacketBattlePing {
                 TurnBasedMinecraftMod.proxy.setBattleGuiAsGui();
                 TurnBasedMinecraftMod.proxy.setBattleGuiBattleChanged();
                 TurnBasedMinecraftMod.proxy.setBattleGuiTime(pkt.decisionSeconds);
+                TurnBasedMinecraftMod.proxy.pauseMCMusic();
             });
             ctx.setPacketHandled(true);
         }