regex: don't assume uint64_t or uint32_t

* lib/regcomp.c (init_word_char): Don't assume that the types
uint64_t and uint32_t exist.  The C standard doesn't guarantee
them, and on some 32-bit compilers there is no uint64_t.
Problem reported by Gianluigi Tiesi in
<http://lists.gnu.org/archive/html/bug-gnulib/2012-03/msg00154.html>.

ChangeLog

@@ -1,3 +1,12 @@
+2012-05-26  Paul Eggert  <eggert@cs.ucla.edu>
+
+	regex: don't assume uint64_t or uint32_t
+	* lib/regcomp.c (init_word_char): Don't assume that the types
+	uint64_t and uint32_t exist.  The C standard doesn't guarantee
+	them, and on some 32-bit compilers there is no uint64_t.
+	Problem reported by Gianluigi Tiesi in
+	<http://lists.gnu.org/archive/html/bug-gnulib/2012-03/msg00154.html>.
+
 2012-05-25  Jim Meyering  <meyering@redhat.com>
 
 	maint.mk: add strncpy-prohibiting syntax-check rule

lib/regcomp.c

@@ -956,18 +956,22 @@ init_word_char (re_dfa_t *dfa)
   int ch = 0;
   if (BE (dfa->map_notascii == 0, 1))
     {
+      bitset_word_t bits0 = 0x00000000;
+      bitset_word_t bits1 = 0x03ff0000;
+      bitset_word_t bits2 = 0x87fffffe;
+      bitset_word_t bits3 = 0x07fffffe;
       if (BITSET_WORD_BITS == 64)
 	{
-	  dfa->word_char[0] = UINT64_C (0x03ff000000000000);
-	  dfa->word_char[1] = UINT64_C (0x07fffffe87fffffe);
+	  dfa->word_char[0] = bits1 << 31 << 1 | bits0;
+	  dfa->word_char[1] = bits3 << 31 << 1 | bits2;
 	  i = 2;
 	}
       else if (BITSET_WORD_BITS == 32)
 	{
-	  dfa->word_char[0] = UINT32_C (0x00000000);
-	  dfa->word_char[1] = UINT32_C (0x03ff0000);
-	  dfa->word_char[2] = UINT32_C (0x87fffffe);
-	  dfa->word_char[3] = UINT32_C (0x07fffffe);
+	  dfa->word_char[0] = bits0;
+	  dfa->word_char[1] = bits1;
+	  dfa->word_char[2] = bits2;
+	  dfa->word_char[3] = bits3;
 	  i = 4;
 	}
       else