Allow multiple calls to gl_sockets_startup.

[pspp] / ChangeLog

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+2009-08-02  Bruno Haible  <bruno@clisp.org>
+
+       Allow multiple calls to gl_sockets_startup.
+       * lib/sockets.c (initialized_sockets_version): New variable.
+       (gl_sockets_startup): Do nothing if already called for this or a higher
+       version.
+       (gl_sockets_cleanup): Reset initialized_sockets_version.
+
 2009-08-03  Simon Josefsson  <simon@josefsson.org>
 
        * tests/test-argp-version-etc-1.sh: Use EXEEXT.  Don't fail on