Fix more 'cpo' issues in runtime files.

runtime/indent/sqlanywhere.vim

@@ -48,6 +48,8 @@ setlocal indentexpr=GetSQLIndent()
 if exists("*GetSQLIndent")
     finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 " List of all the statements that start a new block.
 " These are typically words that start a line.
@@ -382,4 +384,7 @@ function GetSQLIndent()
     return s:ModuloIndent(ind)
 endfunction
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 " vim:sw=4: