windows: fix the MinGW build

src/win/fs.c

@@ -726,7 +726,7 @@ void fs__readdir(uv_fs_t* req) {
 #ifdef _MSC_VER
   swprintf(path2, len + 3, fmt, pathw);
 #else
-  swprintf(path2, fmt, path);
+  swprintf(path2, fmt, pathw);
 #endif
   dir = FindFirstFileW(path2, &ent);
   free(path2);

src/win/winapi.h

@@ -4379,6 +4379,11 @@ typedef NTSTATUS (NTAPI *sNtQuerySystemInformation)
 # define ENABLE_EXTENDED_FLAGS 0x80
 #endif
 
+/* from winerror.h */
+#ifndef ERROR_SYMLINK_NOT_SUPPORTED
+# define ERROR_SYMLINK_NOT_SUPPORTED 1464
+#endif
+
 typedef BOOL (WINAPI *sGetQueuedCompletionStatusEx)
              (HANDLE CompletionPort,
               LPOVERLAPPED_ENTRY lpCompletionPortEntries,