Some fixes for Solaris (2.5).

Fixed path to png.h in gdk_imlib_private.h.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@185 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/threadpsx.cpp

@@ -16,6 +16,7 @@
 #include <unistd.h>
 #include <sched.h>
 #include <pthread.h>
+#include <errno.h>
 #include "wx/thread.h"
 #include "wx/module.h"
 #include "wx/utils.h"