os_compat: use correct struct stat in Windows

The stat macro in os_compat.h shadowed the stat macro in mingw64
headers, which caused proceeding code to use a stat structure with
32-bit st_size instead of the 64-bit struct _stat64 used by win32_stat
and _wstat64. Those structs have a different size, which was causing
win32_stat to corrupt adjacent variables on the stack.

Since using macros for stat is tricky, avoid macros by defining
crip_stat instead.

src/cyanrip_main.c

@@ -1261,7 +1261,7 @@ char *crip_get_path(cyanrip_ctx *ctx, enum CRIPPathType type, int create_dirs,
  for (int i = 0; i < dir_list_nb; i++) {
  if (create_dirs) {
  struct stat st_req = { 0 };
- if (stat(dir_list[i], &st_req) == -1)
+ if (crip_stat(dir_list[i], &st_req) == -1)
  mkdir(dir_list[i], 0700);
  }
  av_free(dir_list[i]);

src/os_compat.h

@@ -23,6 +23,7 @@
 
 #ifdef _WIN32
 #include <direct.h>
+#include <sys/stat.h>
 #include <windows.h>
 #include <wchar.h>
 #include <libavutil/mem.h>
@@ -48,19 +49,22 @@ static inline int win32_mkdir(const char *filename_utf8)
  return ret;
 }
 
-static inline int win32_stat(const char *filename_utf8, struct stat* statbuf)
+static inline int crip_stat(const char *filename_utf8, struct stat* statbuf)
 {
  wchar_t *filename_w;
  int ret;
  if (utf8towchar(filename_utf8, &filename_w))
  return -1;
- ret = _wstat64(filename_w, (struct _stat64 *)statbuf);
+ /* Assume struct stat is the same as struct _stat64, which should be true
+ * because Meson sets _FILE_OFFSET_BITS=64 for mingw64 */
+ ret = _wstat64(filename_w, statbuf);
  av_free(filename_w);
  return ret;
 }
 
 #define mkdir(path, mode) win32_mkdir(path)
-#define stat(path, statbuf) win32_stat(path, statbuf)
+#else
+#define crip_stat stat
 #endif
 
 #if defined(__MACH__)