Remove duplicate variable initializations identified by clang static checker.

One of these represents a nontrivial bug (a promptly-leaked palloc), so
backpatch.

Greg Stark

src/backend/tsearch/regis.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/tsearch/regis.c,v 1.7 2009/06/11 14:49:03 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/tsearch/regis.c,v 1.8 2009/08/30 16:53:31 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -182,7 +182,7 @@ RS_free(Regis *r)
 static bool
 mb_strchr(char *str, char *c)
 {
-	int			clen = pg_mblen(c),
+	int			clen,
 				plen,
 				i;
 	char	   *ptr = str;

src/backend/tsearch/ts_parse.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/tsearch/ts_parse.c,v 1.14 2009/08/18 10:30:41 teodor Exp $
+ *	  $PostgreSQL: pgsql/src/backend/tsearch/ts_parse.c,v 1.15 2009/08/30 16:53:31 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -101,7 +101,6 @@ LexizeAddLemm(LexizeData *ld, int type, char *lemm, int lenlemm)
 {
 	ParsedLex  *newpl = (ParsedLex *) palloc(sizeof(ParsedLex));
 
-	newpl = (ParsedLex *) palloc(sizeof(ParsedLex));
 	newpl->type = type;
 	newpl->lemm = lemm;
 	newpl->lenlemm = lenlemm;

src/backend/utils/adt/encode.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/encode.c,v 1.24 2009/08/04 16:08:36 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/encode.c,v 1.25 2009/08/30 16:53:31 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -159,7 +159,7 @@ hex_decode(const char *src, unsigned len, char *dst)
 			   *srcend;
 	char		v1,
 				v2,
-			   *p = dst;
+			   *p;
 
 	srcend = src + len;
 	s = src;