large integer truncation in regex module

[Gianluigi Tiesi]

While compiling regex module one android I've discovered a problem that 
on other 32bit compiler is only a warning

in regcomp.c at 961

      dfa->word_char[0] = UINT64_C (0x03ff000000000000);
      dfa->word_char[1] = UINT64_C (0x07fffffe87fffffe);

the datatype is defined as unsigned long
but since the code is surrounded by an if

if (BITSET_WORD_BITS == 64)

it's correct, but I think an ifdef may be used instead since 
BITSET_WORD_BITS is a define, it should be ok

Regards

--
Gianluigi Tiesi <address@hidden>
EDP Project Leader
Netfarm S.r.l. - http://www.netfarm.it/
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