Make select work for MS Windows.

This commit was SVN r14845.

opal/event/select.c

@@ -42,7 +42,9 @@
 #endif
 #include <sys/queue.h>
 #include <sys/tree.h>
+#ifndef __WINDOWS__
 #include <signal.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -73,6 +75,11 @@ extern opal_mutex_t opal_event_lock;
 extern volatile sig_atomic_t opal_evsignal_caught;
 #endif
 
+#ifdef __WINDOWS__
+#define NFDBITS 32
+int fd_mask;
+#endif
+
 struct selectop {
 	int event_fds;		/* Highest fd in fd set */
 	int event_fdsz;