bug: undefined HVM_RET return value

[skorpion17]

hikepkg-tutorial/dpi.bpf.c

Line 125 in 67cb62e

goto out;

the HVM_RET return value is left undefined if the processing path takes the goto at line 125.
Please check also other paths to be sure that we always return a defined (initialized) HVM_RET value to the caller chain.