Bug in vesa config

[Mike Emmel]

This line in configure.ac is wrong.

@@ -1663,8 +1701,9 @@ AM_CONDITIONAL(XSDLSERVER, [test x"$XSDL
 AM_CONDITIONAL(XEPHYR, [test "x$KDRIVE" = xyes && test "x$XEPHYR" = xyes])
 AM_CONDITIONAL(BUILD_KDRIVEFBDEVLIB, [test "x$KDRIVE" = xyes && test
"x$KDRIVEFBDEVLIB" = xyes])
 AM_CONDITIONAL(XFAKESERVER, [test "x$KDRIVE" = xyes && test "x$XFAKE" = xyes])
-AM_CONDITIONAL(KDRIVEVESA, [test x"$ac_cv_header_sys_vm86_h" = xyes])
+AM_CONDITIONAL(KDRIVEVESA, [test x"$KDRIVEVESA" = xyes])