odbccp32: Implement SQLGetPrivateProfileString

[Nikolay Sivov]

On 09.06.2015 13:00, Alistair Leslie-Hughes wrote:

> @@ -415,12 +416,56 @@ int WINAPI SQLGetPrivateProfileString(LPCSTR lpszSection, LPCSTR lpszEntry,
>                 LPCSTR lpszDefault, LPCSTR RetBuffer, int cbRetBuffer,
>                 LPCSTR lpszFilename)

I turns out our definition is wrong, PSDK uses LPSTR/LPWSTR for output 
buffer. Fixing that (including header of course) will fix casts that you 
had to use to cast const away.

Also I think we want SQLGetPrivateProfileStringW to be implemented 
first, and forward SQLGetPrivateProfileString to it, unless there's a 
reason not to do that, like differences in behavior that some tests reveal.