utils/common-ps: fix popen/pclose for Windows

Broken in cbb6b96

Not strictly needed since hwloc-ps isn't built on Windows
and lstopo --ps does nothing there, but the build is easy to fix.

Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

utils/hwloc/common-ps.c

@@ -247,6 +247,12 @@ int hwloc_ps_read_process(hwloc_topology_t topology, hwloc_const_bitmap_t topocp
   return -1;
 }
 
+#ifdef HWLOC_WIN_SYS
+/* hwloc-ps isn't built for Windows, but lstopo is */
+#define popen _popen
+#define pclose _pclose
+#endif
+
 void hwloc_ps_pidcmd(struct hwloc_ps_process *proc, const char *pidcmd)
 {
   char *cmd;