Log objects should be local

Otherwise things might be logged under the wrong label.

unix/vncconfig/vncconfig.cxx

@@ -50,7 +50,7 @@
 
 using namespace rfb;
 
-LogWriter vlog("vncconfig");
+static LogWriter vlog("vncconfig");
 
 StringParameter displayname("display", "The X display", "");
 BoolParameter noWindow("nowin", "Don't display a window", 0);

vncviewer/vncviewer.cxx

@@ -81,7 +81,7 @@
 #include "win32.h"
 #endif
 
-rfb::LogWriter vlog("main");
+static rfb::LogWriter vlog("main");
 
 using namespace network;
 using namespace rfb;