fix bug

proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftVarintFrameDecoder.java

@@ -51,7 +51,10 @@ public class MinecraftVarintFrameDecoder extends ByteToMessageDecoder {
       return;
     }
 
-    if (reader.getResult() == DecodeResult.SUCCESS) {
+    if (reader.getResult() == DecodeResult.RUN_OF_ZEROES) {
+      // this will return to the point where the next varint starts
+      in.readerIndex(varintEnd);
+    } else if (reader.getResult() == DecodeResult.SUCCESS) {
       int readVarint = reader.getReadVarint();
       int bytesRead = reader.getBytesRead();
       if (readVarint < 0) {

proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/VarintByteDecoder.java

@@ -33,7 +33,6 @@ class VarintByteDecoder implements ByteProcessor {
       return true;
     }
     if (result == DecodeResult.RUN_OF_ZEROES) {
-      result = DecodeResult.SUCCESS;
       return false;
     }
     readVarint |= (k & 0x7F) << bytesRead++ * 7;