Fix compile warning on Solaris, per buildfarm. (Why have we got

three slightly different copies of this file?)

contrib/hstore/crc32.c

@@ -90,7 +90,7 @@ static const unsigned int crc32tab[256] = {
 unsigned int
 crc32_sz(char *buf, int size)
 {
-	unsigned int crc = ~0;
+	unsigned int crc = ~((unsigned int) 0);
 	char	   *p;
 	int			len,
 				nr;

contrib/ltree/crc32.c

 /* Both POSIX and CRC32 checksums */
 
-/* $PostgreSQL: pgsql/contrib/ltree/crc32.c,v 1.7 2006/09/22 21:39:57 tgl Exp $ */
+/* $PostgreSQL: pgsql/contrib/ltree/crc32.c,v 1.8 2007/07/15 22:40:28 tgl Exp $ */
 
 #include <sys/types.h>
 #include <stdio.h>
@@ -99,7 +99,7 @@ static const unsigned int crc32tab[256] = {
 unsigned int
 ltree_crc32_sz(char *buf, int size)
 {
-	unsigned int crc = ~0;
+	unsigned int crc = ~((unsigned int) 0);
 	char	   *p;
 	int			len,
 				nr;

contrib/tsearch2/crc32.c

 /* Both POSIX and CRC32 checksums */
 
-/* $PostgreSQL: pgsql/contrib/tsearch2/crc32.c,v 1.3 2006/03/11 04:38:30 momjian Exp $ */
+/* $PostgreSQL: pgsql/contrib/tsearch2/crc32.c,v 1.4 2007/07/15 22:40:28 tgl Exp $ */
 
 #include <sys/types.h>
 #include <stdio.h>
@@ -92,7 +92,7 @@ static const unsigned int crc32tab[256] = {
 unsigned int
 crc32_sz(char *buf, int size)
 {
-	unsigned int crc = ~0;
+	unsigned int crc = ~((unsigned int) 0);
 	char	   *p;
 	int			len,
 				nr;