avoid setting cvars by name each frame

code/client/cl_parse.c

@@ -366,7 +366,11 @@ void CL_SystemInfoChanged( void ) {
 	// in the future, (val) will be a protocol version string, so only
 	//  accept explicitly 1, not generally non-zero.
 	s = Info_ValueForKey( systemInfo, "sv_voip" );
-	cl_connectedToVoipServer = (atoi( s ) == 1);
+	if ( Cvar_VariableValue( "g_gametype" ) == GT_SINGLE_PLAYER || Cvar_VariableValue("ui_singlePlayerActive"))
+		cl_connectedToVoipServer = qfalse;
+	else
+		cl_connectedToVoipServer = (atoi( s ) == 1);
+
 #endif
 
 	s = Info_ValueForKey( systemInfo, "sv_cheats" );