Make Luanti buildable for macOS 10.15 also. (#15352)

src/client/sound/sound_data.h

@@ -11,6 +11,7 @@
 #include "ogg_file.h"
 #include <memory>
 #include <tuple>
+#include <vector>
 
 namespace sound {
 

src/network/networkpacket.h

@@ -8,6 +8,7 @@
 #include "irrlichttypes_bloated.h"
 #include "networkprotocol.h"
 #include <SColor.h>
+#include <vector>
 
 class NetworkPacket
 {

src/objdef.h

@@ -6,6 +6,7 @@
 
 #include "util/basic_macros.h"
 #include "porting.h"
+#include <vector>
 
 class IGameDef;
 class NodeDefManager;