(Maybe) fixed a problem detecting when win32 screen saver started.

lib/platform/CMSWindowsDesks.cpp

@@ -115,6 +115,8 @@ CMSWindowsDesks::~CMSWindowsDesks()
 void
 CMSWindowsDesks::enable()
 {
+	m_threadID = GetCurrentThreadId();
+
 	// set the active desk and (re)install the hooks
 	checkDesk();
 
@@ -844,6 +846,10 @@ CMSWindowsDesks::checkDesk()
 			sendMessage(SYNERGY_MSG_LEAVE, (WPARAM)m_keyLayout, 0);
 		}
 	}
+	else if (name != m_activeDeskName) {
+		// screen saver might have started
+		PostThreadMessage(m_threadID, SYNERGY_MSG_SCREEN_SAVER, TRUE, 0);
+	}
 }
 
 bool