Fix RegEnumValueW returned 234 #696
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RegEnumValueW may return ERROR_MORE_DATA (234).
If lpData is NULL and lpcbData is non-NULL, the function stores the size of the data, in bytes, in the variable pointed to by lpcbData. This enables an application to determine the best way to allocate a buffer for the data.
If the buffer specified by lpData is not large enough to hold the data, the function returns ERROR_MORE_DATA and stores the required buffer size in the variable pointed to by lpcbData. In this case, the contents of lpData are undefined.