Make sure HAVE_DOXYGEN is defined when not building dmx
The DMX docs are build using doxygen if present, so configure.ac checks to see if that is available. However, when not building dmx (the default), this conditional must still be defined to make automake happy. Signed-off-by: Keith Packard <keithp@keithp.com>
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					@ -1816,6 +1816,8 @@ fi
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AC_MSG_RESULT([$DMX])
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					AC_MSG_RESULT([$DMX])
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AM_CONDITIONAL(DMX, [test "x$DMX" = xyes])
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					AM_CONDITIONAL(DMX, [test "x$DMX" = xyes])
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					DOXYGEN="not_found"
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if test "x$DMX" = xyes; then
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					if test "x$DMX" = xyes; then
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	if test "x$have_dmx" = xno; then
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						if test "x$have_dmx" = xno; then
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		AC_MSG_ERROR([Xdmx build explicitly requested, but required
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							AC_MSG_ERROR([Xdmx build explicitly requested, but required
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					@ -1855,9 +1857,9 @@ dnl Linux sources in DMX require <linux/keyboard.h>
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	if test "x$DOXYGEN" = "xnot_found" ; then
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						if test "x$DOXYGEN" = "xnot_found" ; then
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	    AC_MSG_WARN([doxygen not found in $PATH. Cannot build documentation])
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						    AC_MSG_WARN([doxygen not found in $PATH. Cannot build documentation])
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	fi
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						fi
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	AM_CONDITIONAL([HAVE_DOXYGEN], [test "x$DOXYGEN" != "xnot_found"])
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	AC_SUBST(DOXYGEN)
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						AC_SUBST(DOXYGEN)
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fi
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					fi
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					AM_CONDITIONAL([HAVE_DOXYGEN], [test "x$DOXYGEN" != "xnot_found"])
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AM_CONDITIONAL([DMX_BUILD_LNX], [test "x$DMX_BUILD_LNX" = xyes])
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					AM_CONDITIONAL([DMX_BUILD_LNX], [test "x$DMX_BUILD_LNX" = xyes])
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AM_CONDITIONAL([DMX_BUILD_USB], [test "x$DMX_BUILD_USB" = xyes])
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					AM_CONDITIONAL([DMX_BUILD_USB], [test "x$DMX_BUILD_USB" = xyes])
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