Fix direct casts from char* to wchar_t*

[jcorrius]

In the code we can find two potentially incorrect cast from an byte string (char *) to a wide-character string (wchar_t *).

CatalanitzadorPerAlWindows/Core/UploadStatisticsThread.cpp:61
CatalanitzadorPerAlWindows/Core/LogFile.cpp:103

We need to use the appropriate conversion functions for this conversions.