* symtype: set to SymPdb not SymCv (may be for old pdb-files pre VS 6.0)
* flags: return SYMFLAG_PUBLIC_CODE for SymTagPublicSymbol if its a function.
* flags: do not return SYMFLAG_FUNCTION for SymTagFuncion.
Debug symbols (like PDB, ...) could not be found if the direcory of
the module and application differs. Applying this patch they will
be found.
Dbghelp searches the module path too. (See MS docs).
