src: conditionalize / remove use of poll.h

Remove imports of poll.h which are redundant, and
conditionalize remaining usage that needs to compile
on Windows platforms.

Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

src/util/virpolkit.c

@@ -20,7 +20,6 @@
  */
 
 #include <config.h>
-#include <poll.h>
 
 #include "virpolkit.h"
 #include "virerror.h"
@@ -36,6 +35,7 @@
 VIR_LOG_INIT("util.polkit");
 
 #if WITH_POLKIT
+# include <poll.h>
 
 struct _virPolkitAgent {
     virCommandPtr cmd;

src/util/virutil.c

@@ -25,7 +25,6 @@
 
 #include <unistd.h>
 #include <fcntl.h>
-#include <poll.h>
 #include <sys/stat.h>
 
 #ifdef WIN32

tests/commandhelper.c

@@ -23,13 +23,13 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/stat.h>
-#include <poll.h>
 
 #include "internal.h"
 #define NO_LIBVIRT
 #include "testutils.h"
 
 #ifndef WIN32
+# include <poll.h>
 
 /* Some UNIX lack it in headers & it doesn't hurt to redeclare */
 extern char **environ;