Fix Counter#decrement recursive call (#5665)

Spigot-API-Patches/0004-Timings-v2.patch

@@ -2018,7 +2018,7 @@ index 0000000000000000000000000000000000000000..632c4961515f5052551f841cfa840e60
 +}
 diff --git a/src/main/java/co/aikar/util/Counter.java b/src/main/java/co/aikar/util/Counter.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..80155072d1004e34e04342d434cf7d75f0b7e29d
+index 0000000000000000000000000000000000000000..eff63c371c39e21a5a9cb5af8c2dcf78a60dd52b
 --- /dev/null
 +++ b/src/main/java/co/aikar/util/Counter.java
 @@ -0,0 +1,38 @@
@@ -2041,7 +2041,7 @@ index 0000000000000000000000000000000000000000..80155072d1004e34e04342d434cf7d75
 +        return increment(key, 1);
 +    }
 +    public long decrement(@Nullable T key, long amount) {
-+        return decrement(key, -amount);
++        return increment(key, -amount);
 +    }
 +    public long increment(@Nullable T key, long amount) {
 +        Long count = this.getCount(key);