Improve descriptions of HAVE_ASPRINTF / HAVE_VASPRINTF.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@726 d4fa192b-c00b-0410-8231-f00ffab90ce4

configure.ac

@@ -68,11 +68,11 @@ AC_CHECK_FUNCS([strlcpy])
 # are present in the C library, but their prototypes are hidden behind
 # conditionals which we won't bother to unravel.
 AC_CHECK_DECL([asprintf],
-	AC_DEFINE(HAVE_ASPRINTF,1,[Whether asprintf() is available]),
+	AC_DEFINE(HAVE_ASPRINTF,1,[Define to 1 if asprintf() is available]),
 	,
 	[stdio.h])
 AC_CHECK_DECL([vasprintf],
-	AC_DEFINE(HAVE_VASPRINTF,1,[Whether vasprintf() is available]),
+	AC_DEFINE(HAVE_VASPRINTF,1,[Define to 1 if vasprintf() is available]),
 	,
 	[stdio.h])