[Pidgin] #16836: configure fails due to bashisms

[Pidgin]

#16836: configure fails due to bashisms
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 Reporter:  lameventanas  |      Owner:  EionRobb
     Type:  defect        |     Status:  new
Milestone:                |  Component:  unclassified
  Version:  2.10.11       |   Keywords:
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 Using dash as /bin/sh I get this configure error:

 {{{
 checking for LIBXML... yes
 checking for gconftool-2... no
 ./configure: 1: ./configure: gconftool-2: not found
 Using config source  for schema installation
 Using $(sysconfdir)/gconf/schemas as install directory for schema files
 ./configure: 17934: test: xauto: unexpected operator
 ./configure: 18211: test: xauto: unexpected operator
 ./configure: 18309: test: xauto: unexpected operator
 configure: error: --with-gstreamer must specify one of 0.10, 1.0 or auto.
 }}}

 This is due to using == to compare strings, as opposed to =.

 The attached patch fixes this in 2.10.12.

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Ticket URL: <https://developer.pidgin.im/ticket/16836>
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