small accommodation

src/engine/qcommon/common.cpp

@@ -873,11 +873,15 @@ void Com_Frame()
 
 	msec = com_frameTime - lastTime;
 
+	// For framerates up to 250fps, sleep until 1ms is remaining
+	// use extra margin of 2ms when looking for an higher framerate.
+	int margin = minMsec > 3 ? 1 : 2;
+
 	while ( msec < minMsec )
 	{
 		// Never sleep more than 50ms.
-		// Never sleep when there is 2ms or less remaining.
-		int sleep = std::max( std::min( minMsec - msec, 50 ) - 2, 0 );
+		// Never sleep when there is only “margin” left or less remaining.
+		int sleep = std::max( std::min( minMsec - msec, 50 ) - margin, 0 );
 
 		if ( sleep )
 		{