configure.ac: Fix passing --disable-gles option

adoptware / pinball

Emilia Pinball : A Libre pinball simulator for GNU Linux

https://purl.org/rzr/pinball

GNU General Public License v2.0

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Closed lanodan closed 3 years ago

lanodan commented 3 years ago

AC_ARG_ENABLE's 3rd option is action-if-present, not action-if-enabled, this means that --disable-gles would set enable_gles=yes
AC_ARG_ENABLE's 4th option is action-if-not-present, not action-if-disabled

cc: @caramelli

caramelli commented 3 years ago

Nice find, thanks!