Fix macOS deprecated constants

code/sys/sys_osx.m

@@ -50,9 +50,9 @@ dialogResult_t Sys_Dialog( dialogType_t type, const char *message, const char *t
 	[alert setInformativeText: [NSString stringWithUTF8String: message]];
 
 	if( type == DT_ERROR )
-		[alert setAlertStyle: NSCriticalAlertStyle];
+		[alert setAlertStyle: NSAlertStyleCritical];
 	else
-		[alert setAlertStyle: NSWarningAlertStyle];
+		[alert setAlertStyle: NSAlertStyleWarning];
 
 	switch( type )
 	{