Added patches 4-6 (1-3 already in master)
Added patches 4-6 (1-3 already in master)

Patch description:
4: set rtype, fixes ffi_prep_cif call
5: Fix c++-style comments to ANSI C Remove call with uninitialized
   rvalue Fix return types
6: proper error messages

	modified:   Ctypes.xs

alaska/perl-ctypes,alaska/perl-ctypes