Fixed possible infinite loop

Fixed possible infinite loop

sesman/sig.c

@@ -131,7 +131,7 @@ sig_sesman_session_end(int sig)
             session_kill(pid);
         }
     }
-    while (pid >= 0);
+    while (pid > 0);
 }
 
 /******************************************************************************/

xrdp/xrdp.c

@@ -163,7 +163,7 @@ xrdp_shutdown(int sig)
 static void
 xrdp_child(int sig)
 {
-    while (g_waitchild() >= 0)
+    while (g_waitchild() > 0)
     {
     }
 }