configure.ac: print feature name in error message

When MPD_AUTO_DISABLED prints a fatal error message, include the feature name. This might be an important piece of information for the user, just in case the preceding line doesn't tell him.

configure.ac: print feature name in error message
a6ed888f · Max Kellermann · e1f0c534 · a6ed888f
Commit a6ed888f authored Apr 15, 2009 by Max Kellermann
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mpd_auto.m4 m4/mpd_auto.m4 +1 -1

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--- a/m4/mpd_auto.m4
+++ b/m4/mpd_auto.m4
@@ -17,7 +17,7 @@ AC_DEFUN([MPD_AUTO_DISABLED], [
 		AC_MSG_WARN([$msg -- disabling $feature])
 		eval "$var=no"
 	elif eval "test x`echo '$'$var` = xyes"; then
-		AC_MSG_ERROR([$msg])
+		AC_MSG_ERROR([$feature: $msg])
 	fi
 ])