Avoid calling stat() after readdir() on Windows as we already have what we want

src/windows/dirent.c

@@ -103,7 +103,13 @@ struct dirent *readdir(DIR *dir)
         if(!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1)
         {
             result         = &dir->result;
+            result->d_mtime = dir->info.time_write;
+            result->d_size = dir->info.size;
             result->d_name = dir->info.name;
+            if (dir->info.attrib & _A_SUBDIR)
+                result->d_mode = S_IFDIR;
+            else
+                result->d_mode = S_IFREG;
         }
     }
     else

src/windows/dirent.h

@@ -21,6 +21,12 @@ typedef struct DIR DIR;
 struct dirent
 {
     char *d_name;
+    // The native call we use, findfirst/next return file attributes at once,
+    // no need for a separate stat() call in most cases
+    // Note that ctime is actually creation time. No use for posix.
+    time_t d_mtime;
+    off_t d_size;
+    int   d_mode; // S_IFREG or S_IFDIR only
 };
 
 DIR           *opendir(const char *);