jvlc: libvlcState enum index comment added for reference

bindings/java/core/src/main/java/org/videolan/jvlc/internal/LibVlcState.java

@@ -28,14 +28,14 @@ package org.videolan.jvlc.internal;
 
 public enum LibVlcState
 {
-    libvlc_NothingSpecial,
-    libvlc_Opening,
-    libvlc_Buffering,
-    libvlc_Playing,
-    libvlc_Paused,
-    libvlc_Stopped,
-    libvlc_Forward,
-    libvlc_Backward,
-    libvlc_Ended,
-    libvlc_Error;
+    libvlc_NothingSpecial, // 0
+    libvlc_Opening, // 1
+    libvlc_Buffering, // 2
+    libvlc_Playing, // 3
+    libvlc_Paused, // 4
+    libvlc_Stopped, // 5
+    libvlc_Forward, // 6
+    libvlc_Backward, // 7
+    libvlc_Ended, // 8
+    libvlc_Error; // 9
 }