Make client for Windows x86_64 use OpenAL64.dll by default

ioquake3.x86_64.exe can't load x86 OpenAL32.dll. Using separate
library names allows shipping OpenAL for both architectures.

Though since the dll name is saved in the config file, using both
clients on the same computer will cause one client arch to always
try to load the wrong OpenAL dll and then fallback to the correct
default OpenAL dll. I guess it could be fixed by using separate
cvar names for s_alDriver.

code/client/snd_openal.c

@@ -2206,7 +2206,9 @@ static ALCdevice *alCaptureDevice;
 static cvar_t *s_alCapture;
 #endif
 
-#ifdef _WIN32
+#if defined(_WIN64)
+#define ALDRIVER_DEFAULT "OpenAL64.dll"
+#elif defined(_WIN32)
 #define ALDRIVER_DEFAULT "OpenAL32.dll"
 #elif defined(__APPLE__)
 #define ALDRIVER_DEFAULT "/System/Library/Frameworks/OpenAL.framework/OpenAL"

misc/nsis/Makefile

@@ -38,6 +38,13 @@ ifndef SDLDLL
 		SDLDLL=SDL2.dll
 	endif
 endif
+ifndef OPENALDLL
+	ifeq ($(ARCH),x86_64)
+		OPENALDLL=OpenAL64.dll
+	else
+		OPENALDLL=OpenAL32.dll
+	endif
+endif
 
 DEFINES=
 ifeq ($(USE_RENDERER_DLOPEN),1)
@@ -63,7 +70,7 @@ endif
 all: ioquake3-$(VERSION)-$(RELEASE).$(ARCH).exe
 
 ioquake3.$(ARCH).nsi: ioquake3.nsi.in
-	sed 's/XXXVERSIONXXX/$(VERSION)/;s/XXXRELEASEXXX/$(RELEASE)/;s/mingw32/$(PLATFORM)/g;s/x86/$(ARCH)/g;s/SDL2.dll/$(SDLDLL)/g' < $< > $@
+	sed 's/XXXVERSIONXXX/$(VERSION)/;s/XXXRELEASEXXX/$(RELEASE)/;s/mingw32/$(PLATFORM)/g;s/x86/$(ARCH)/g;s/SDL2.dll/$(SDLDLL)/g;s/OpenAL32.dll/$(OPENALDLL)/g' < $< > $@
 
 ioquake3-$(VERSION)-$(RELEASE).$(ARCH).exe: ioquake3.$(ARCH).nsi
 	makensis $(DEFINES) ioquake3.$(ARCH).nsi