Fixed a bug in the Windows implementation of the signaler object, which was found

by Isaac Peterson.  The bug caused the program to deadlock if signal() or
broadcast() was called at exactly the same time a wait_or_timeout() funciton timed
out.

dlib/threads/threads_kernel_1.h

@@ -150,6 +150,9 @@ namespace dlib
                 // broadcast().
                 value = false;
 
+                // signal that we are awake
+                ReleaseSemaphore(hCountSema,(LONG)1,NULL);
+
                 // get a lock on the mutex for the waiters variable
                 waiters_mutex.lock();
                 // mark that one less thread will be waiting on this signaler. 
@@ -161,10 +164,11 @@ namespace dlib
             else 
             {
                 value = true;
+
+                // signal that we are awake
+                ReleaseSemaphore(hCountSema,(LONG)1,NULL);
             }
 
-            // signal that we are awake
-            ReleaseSemaphore(hCountSema,(LONG)1,NULL);
 
             // relock the associated mutex 
             m.lock();