wininet: Don't discard the extra info part of a URL in InternetOpenUrl.

[Ron Yorston]

A fix to winnet/internet.c turned up in 0.9.32 that's supposed to ensure
that the "extra info" part of a URL is correctly included.  I think
there's a problem with the patch.  On line 2865 space is allocated
for the extra info:

   if (!(path_extra = HeapAlloc(GetProcessHeap(), 0, size)))

Shouldn't this be in units of sizeof(WCHAR)?  That is,

   if (!(path_extra = HeapAlloc(GetProcessHeap(), 0, size*sizeof(WCHAR))))

Ron