* xgselect.c (xg_select): Clear file descriptors not set from rfds and wfds.

src/ChangeLog

+2010-09-26  Jan Djärv  <jan.h.d@swipnet.se>
+
+	* xgselect.c (xg_select): Clear file descriptors not set from
+	rfds and wfds.
+
 2010-09-21  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* syntax.c (back_comment): Detect the case where a 1-char comment

src/xgselect.c

@@ -113,11 +113,17 @@ xg_select (max_fds, rfds, wfds, efds, timeout)
               if (rfds && FD_ISSET (i, rfds)) ++retval;
               else ++our_fds;
             }
+          else if (rfds)
+            FD_CLR (i, rfds);
+
           if (have_wfds && FD_ISSET (i, &all_wfds))
             {
               if (wfds && FD_ISSET (i, wfds)) ++retval;
               else ++our_fds;
             }
+          else if (wfds)
+            FD_CLR (i, wfds);
+
           if (efds && FD_ISSET (i, efds))
             ++retval;
         }