Fix ecpg parsing of sizeof().

The last fix used the wrong non-terminal to define valid types.

src/interfaces/ecpg/preproc/ecpg.trailer

@@ -1865,10 +1865,10 @@ Iresult:        Iconst			{ $$ = $1; }
                 | Iresult '%' Iresult		{ $$ = cat_str(3, $1, mm_strdup("%"), $3); }
                 | ecpg_sconst			{ $$ = $1; }
                 | ColId				{ $$ = $1; }
-		| ColId '(' ColId ')'   { if (pg_strcasecmp($1, "sizeof") != 0)
+		| ColId '(' var_type ')'        { if (pg_strcasecmp($1, "sizeof") != 0)
 							mmerror(PARSE_ERROR, ET_ERROR, "operator not allowed in variable definition");
 						  else
-						$$ = cat_str(4,$1, mm_strdup("("), $3, mm_strdup(")"));
+							$$ = cat_str(4, $1, mm_strdup("("), $3.type_str, mm_strdup(")"));
 						}
                 ;