Description:
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When I use -O2, -O3 or -O5 flags there are two errors.
Problem file is ext/hash/php_hash_tiger.h.

Reproduce code:
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typedef struct {
        php_hash_uint64 state[3];
        php_hash_uint64 passed;
        unsigned char passes:1;
        unsigned char length:7;
        unsigned char buffer[64];
} PHP_TIGER_CTX;


Expected result:
----------------
I've changed to this and now there are no errors
typedef struct {
        php_hash_uint64 state[3];
        php_hash_uint64 passed;
        unsigned int passes:1;
        unsigned int length:7;
        unsigned char buffer[64];
} PHP_TIGER_CTX;


Actual result:
--------------
Is that correct or I will have problem other modules?