kernel32: Fix uninitialised memory read in GetPrivateProfileStringA if GetPrivateProfileStringW returns 0.

[Rob Shearman]

The that was passed into the function will remain uninitialised. Fix
reading from this by only reading retW characters from bufferW and
manually nul-terminating the string.
---
 dlls/kernel32/profile.c |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

Fixes the uninitialised memory reads reported here:
http://kegel.com/wine/valgrind/logs/2009-11-27-12.53/vg-kernel32_profile.txt
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