The counter should start from 0. Otherwise, according to the program logic, even if the removethreadid method is called, the counter will not be reduced to 0.

Signed-off-by: why技术 <thisiswhy@outlook.com>

redisson/src/main/java/org/redisson/RedissonBaseLock.java

@@ -57,7 +57,7 @@ public abstract class RedissonBaseLock extends RedissonExpirable implements RLoc
 
         public synchronized void addThreadId(long threadId) {
             threadIds.compute(threadId, (t, counter) -> {
-                counter = Optional.ofNullable(counter).orElse(1);
+                counter = Optional.ofNullable(counter).orElse(0);
                 counter++;
                 return counter;
             });