c-pragma.c (handle_pragma_pack): Correct parsing logic so it won't give a spurious...

c-pragma.c (handle_pragma_pack): Correct parsing logic so it won't give a spurious error for '#pragma pack()'.

	* c-pragma.c (handle_pragma_pack): Correct parsing logic so it
	won't give a spurious error for '#pragma pack()'.  Simplify
	control flow for readability.  'reset' action is not necessary.

From-SVN: r36308