Fix ksh/bash-ism.

* configure.in (unexpand_shvar): Use the numeric comparison
  operator instead of '==' which is a ksh extention. [Bug #7941]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39481 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Feb 25 11:03:38 2013  Akinori MUSHA  <knu@iDaemons.org>
+
+	* configure.in (unexpand_shvar): Use the numeric comparison
+	  operator instead of '==' which is a ksh extention. [Bug #7941]
+
 Mon Feb 25 02:37:56 2013  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket: define and use union_sockaddr instead of struct

configure.in

@@ -3282,7 +3282,7 @@ shvar_to_cpp() {
 unexpand_shvar() {
     local var=$1 val n v expr quote
     shift
-    test "$#" == 0 && return
+    test "$#" -eq 0 && return
     quote=['s/${[^${}"]*}/"&"/g']
     for n do
         eval v='"$'$n'"'