Sketch out detaching threads (with partial implementation).

Change-Id: Iafe5f91c8170d4f90155f509ba9e2e3d921af66f
diff --git a/src/jni_internal.h b/src/jni_internal.h
index ed66e64..a0fe8fc 100644
--- a/src/jni_internal.h
+++ b/src/jni_internal.h
@@ -97,7 +97,7 @@
   int critical;
 
   // Entered JNI monitors, for bulk exit on thread detach.
-  ReferenceTable  monitors;
+  ReferenceTable monitors;
 
   // JNI local references.
   IndirectReferenceTable locals;