Include thread names for release builds too.

src/xpdev/threadwrap.h

@@ -99,7 +99,6 @@ pthread_mutex_t pthread_mutex_initializer_np(BOOL recursive);
 
 #if defined(_POSIX_THREADS)
 
-#ifdef _DEBUG
 #if defined (__FreeBSD__) || defined (__OpenBSD__)
  #include <pthread_np.h>
  #define	SetThreadName(c)	pthread_set_name_np(pthread_self(),c)
@@ -111,9 +110,6 @@ pthread_mutex_t pthread_mutex_initializer_np(BOOL recursive);
 #else
  #define SetThreadName(c)
 #endif
-#else
- #define SetThreadName(c)
-#endif
 
 #else