partially fix amd64 build on windows

Quality of this commit is questionable. I have no idea whether what I did
here makes sense or not.
But it compiles and runs (provided with hlsdk-xash3d amd64 build, which
is another story).

This omits necessary waf changes that are necessary to make a valid
64-bit build. Apparently it's not enough to just pass `-8` on Windows,
you also need to hack wscript to add `x64` target to MSVC. I'll do that
later when I figure out how.

This change is a precursor for RTX Vulkan effort --
VK_KHR_ray_tracing_pipeline and friends are only available on 64-bit
nvidia drivers (no idea about AMD, pls send GPUs onegai).

engine/client/cl_game.c

@@ -3945,7 +3945,7 @@ qboolean CL_LoadProgs( const char *name )
 
 	// a1ba: we need to check if client.dll has direct dependency on SDL2
 	// and if so, disable relative mouse mode
-#if XASH_WIN32
+#if XASH_WIN32 && !defined(XASH_64BIT)
 	if( ( clgame.client_dll_uses_sdl = COM_CheckLibraryDirectDependency( name, OS_LIB_PREFIX "SDL2." OS_LIB_EXT, false ) ) )
 	{
 		Con_Printf( S_NOTE "%s uses SDL2 for mouse input\n", name );

engine/common/filesystem.c

@@ -324,7 +324,7 @@ static void listdirectory( stringlist_t *list, const char *path, qboolean lowerc
 #if XASH_WIN32
 	char pattern[4096];
 	struct _finddata_t	n_file;
-	int		hFile;
+	intptr_t		hFile;
 #else
 	DIR *dir;
 	struct dirent *entry;

engine/platform/win32/con_win.c

@@ -354,7 +354,11 @@ void Wcon_CreateConsole( void )
 
 	if( host.type == HOST_DEDICATED )
 	{
+#ifdef XASH_64BIT
+		s_wcd.SysInputLineWndProc = (WNDPROC)SetWindowLongPtr( s_wcd.hwndInputLine, GWLP_WNDPROC, (LONG_PTR)Wcon_InputLineProc );
+#else
 		s_wcd.SysInputLineWndProc = (WNDPROC)SetWindowLong( s_wcd.hwndInputLine, GWL_WNDPROC, (long)Wcon_InputLineProc );
+#endif
 		SendMessage( s_wcd.hwndInputLine, WM_SETFONT, ( WPARAM )s_wcd.hfBufferFont, 0 );
 	}
 

engine/platform/win32/lib_win.c

@@ -20,9 +20,14 @@ GNU General Public License for more details.
 #ifdef XASH_64BIT
 #include <dbghelp.h>
 
-void *COM_LoadLibrary( const char *dllname, int build_ordinals_table )
+void *COM_LoadLibrary( const char *dllname, int build_ordinals_table, qboolean directpath )
 {
-	return LoadLibraryA( dllname );
+	dll_user_t *hInst;
+
+	hInst = FS_FindLibrary( dllname, directpath );
+	if( !hInst ) return NULL; // nothing to load
+
+	return LoadLibraryA( hInst->fullPath );
 }
 
 void COM_FreeLibrary( void *hInstance )

engine/server/sv_game.c

@@ -3138,9 +3138,9 @@ void SV_AllocStringPool( void )
 #endif
 
 	str64.pstringarray = ptr;
-	str64.pstringarraystatic = ptr + str64.maxstringarray;
+	str64.pstringarraystatic = (byte*)ptr + str64.maxstringarray;
 	str64.pstringbase = str64.poldstringbase = ptr;
-	str64.plast = ptr + 1;
+	str64.plast = (byte*)ptr + 1;
 	svgame.globals->pStringBase = ptr;
 #else
 	svgame.stringspool = Mem_AllocPool( "Server Strings" );
@@ -3153,9 +3153,11 @@ void SV_FreeStringPool( void )
 #ifdef XASH_64BIT
 	Con_Reportf( "SV_FreeStringPool()\n" );
 
+#if USE_MMAP
 	if( str64.pstringarray != str64.staticstringarray )
 		munmap( str64.pstringarray, (str64.maxstringarray * 2) & ~(sysconf( _SC_PAGESIZE ) - 1) );
 	else
+#endif
 		Mem_Free( str64.staticstringarray );
 #else
 	Mem_FreePool( &svgame.stringspool );