Fix for an uninitialized value in pocketsphinx.c and removed unneeded co...

...mparison in s2_semi_mgau.c

These are the fixes I'm making in my local versions due to having warnings as errors. Uninitialized value pos of ps_lookup_word is initialized, and the second unneeded self-comparison is removed from s2_semi_mgau.c. Added a check to prevent unnecessary redefinition of ATTRIBUTE_PACKED.