Fix configure.ac wrt. pthread_np.h

[Gerald Pfeifer]

After the following change to configure.ac

  revision 1.530
  date: 2006-08-07 12:14:41 +0000;  author: julliard;  state: Exp;  lines: +2 -0
  Tijl Coosemans <tijl at ulyssis.org>
  loader/pthread: Added pthread_attr_get_np support.

I have been seeing the following warning.  Indeed, pthread_np.h by itself
cannot be compiled on FreeBSD 5.x:

  configure: WARNING: pthread_np.h: present but cannot be compiled
  configure: WARNING: pthread_np.h:     check for missing prerequisite headers?
  configure: WARNING: pthread_np.h: see the Autoconf documentation
  configure: WARNING: pthread_np.h:     section "Present But Cannot Be Compiled"
  configure: WARNING: pthread_np.h: proceeding with the preprocessor's result
  configure: WARNING: pthread_np.h: in the future, the compiler will take precedence
  configure: WARNING:     ## ------------------------------------ ##
  configure: WARNING:     ## Report this to wine-devel at winehq.org ##
  configure: WARNING:     ## ------------------------------------ ##

The following should address this, I hope.

Gerald

ChangeLog:
Try to #include <pthread.h> before checking for pthread_np.h.

Index: configure.ac
===================================================================
RCS file: /home/wine/wine/configure.ac,v
retrieving revision 1.542
diff -u -3 -p -r1.542 configure.ac
--- configure.ac	16 Aug 2006 15:18:30 -0000	1.542
+++ configure.ac	21 Aug 2006 17:56:59 -0000
@@ -203,7 +203,6 @@ AC_CHECK_HEADERS(\
 	poll.h \
 	process.h \
 	pthread.h \
-	pthread_np.h \
 	pwd.h \
 	regex.h \
 	sched.h \
@@ -298,6 +297,11 @@ AC_CHECK_HEADERS([resolv.h],,,
 
 AC_CHECK_HEADERS(ucontext.h,,,[#include <signal.h>])
 
+AC_CHECK_HEADERS([pthread_np.h],,,
+    [#ifdef HAVE_PTHREAD_H
+     #include <pthread.h.h>
+     #endif])
+
 AC_CHECK_HEADERS([linux/videodev.h],,,
 [#ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>