Revrt (temporarily?) inconsistent change in locking behavior.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@27618 72102866-910b-0410-8b05-ffd578937521

Source/NSLock.m

@@ -447,6 +447,8 @@ NSString *NSRecursiveLockException = @"NSRecursiveLockException";
 
 - (BOOL) tryLock
 {
+  CHECK_RECURSIVE_CONDITION_LOCK(_MUTEX);
+
   // Ask the runtime to acquire a lock on the mutex
   if (objc_mutex_trylock(_MUTEX) == -1)
     return NO;