[PATCH 0/1] MR890: user32: Fix a memory allocation strategy.

[Akihiro Sagawa (＠sgwaki)]

Otherwise, the function allocates a heap memory when prev_size is enough.
What is worse is that it returns the buffer untouched if the prev_size
is insufficient.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53703