util/win32: simplify qemu_get_local_state_dir()

SHGetFolderPath() is a deprecated API:
https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/nf-shlobj_core-shgetfolderpatha

It is a wrapper for SHGetKnownFolderPath() and CSIDL_COMMON_PATH is
mapped to FOLDERID_ProgramData:
https://docs.microsoft.com/en-us/windows/win32/shell/csidl



g_get_system_data_dirs() is a suitable replacement, as it will have
FOLDERID_ProgramData in the returned list. However, it follows the XDG
Base Directory Specification, if `XDG_DATA_DIRS` is defined, it will be
returned instead.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Message-Id: <20220525144140.591926-3-marcandre.lureau@redhat.com>

util/oslib-win32.c

@@ -40,9 +40,6 @@
 #include "qemu/error-report.h"
 #include <malloc.h>
 
-/* this must come after including "trace.h" */
-#include <shlobj.h>
-
 static int get_allocation_granularity(void)
 {
     SYSTEM_INFO system_info;
@@ -237,17 +234,11 @@ int qemu_get_thread_id(void)
 char *
 qemu_get_local_state_dir(void)
 {
-    HRESULT result;
-    char base_path[MAX_PATH+1] = "";
+    const char * const *data_dirs = g_get_system_data_dirs();
 
-    result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
-                             /* SHGFP_TYPE_CURRENT */ 0, base_path);
-    if (result != S_OK) {
-        /* misconfigured environment */
-        g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
-        abort();
-    }
-    return g_strdup(base_path);
+    g_assert(data_dirs && data_dirs[0]);
+
+    return g_strdup(data_dirs[0]);
 }
 
 void qemu_set_tty_echo(int fd, bool echo)