Back out incorrect use of E'' escape addition.

src/interfaces/ecpg/preproc/preproc.y

-/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/preproc.y,v 1.308 2005/07/02 17:01:53 momjian Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/preproc.y,v 1.309 2005/08/22 20:25:03 momjian Exp $ */
 
 /* Copyright comment */
 %{
@@ -4216,16 +4216,11 @@ Bconst:  BCONST				{ $$ = make_name();};
 Xconst:  XCONST				{ $$ = make_name();};
 Sconst:  SCONST
 		{
-			char *ret;
-			
-			$$ = ret = (char *)mm_alloc(strlen($1) + 4);
-			if (strchr($1, '\\') != NULL)
-				*ret++ = ESCAPE_STRING_SYNTAX;
-			*ret++ = '\'';
-			strcpy(ret, $1);
-			ret += strlen($1);
-			*ret++ = '\'';
-			*ret++ = '\0';
+			$$ = (char *)mm_alloc(strlen($1) + 3);
+			$$[0]='\'';
+			strcpy($$+1, $1);
+			$$[strlen($1)+2]='\0';
+			$$[strlen($1)+1]='\'';
 			free($1);
 		}
 		;