File openal.patch of Package springrts

diff -Nur spring_104.0/rts/System/Sound/OpenAL/Sound.cpp spring_104.0-patched/rts/System/Sound/OpenAL/Sound.cpp
--- spring_104.0/rts/System/Sound/OpenAL/Sound.cpp	2017-09-24 20:01:29.000000000 +0200
+++ spring_104.0-patched/rts/System/Sound/OpenAL/Sound.cpp	2020-03-25 22:55:06.844242414 +0100
@@ -4,7 +4,6 @@
 
 #include <cstdlib>
 #include <cmath>
-#include <alc.h>
 
 #ifndef ALC_ALL_DEVICES_SPECIFIER
 #define ALC_ALL_DEVICES_SPECIFIER 0x1013
diff -Nur spring_104.0/rts/System/Sound/OpenAL/Sound.h spring_104.0-patched/rts/System/Sound/OpenAL/Sound.h
--- spring_104.0/rts/System/Sound/OpenAL/Sound.h	2017-09-24 20:01:29.000000000 +0200
+++ spring_104.0-patched/rts/System/Sound/OpenAL/Sound.h	2020-03-25 22:56:10.628993172 +0100
@@ -5,6 +5,7 @@
 
 #include <string>
 #include <vector>
+#include <alc.h>
 
 #include "System/Sound/ISound.h"
 #include "System/float3.h"
@@ -16,8 +17,6 @@
 class CSoundSource;
 class SoundBuffer;
 class SoundItem;
-struct ALCdevice_struct;
-typedef struct ALCdevice_struct ALCdevice;
 
 /// Default sound system implementation (OpenAL)
 class CSound : public ISound