- config.h.in configure.in error.c: fix a compilation problem
  on platforms without vsnprintf (xml@thewrittenword.com)
Daniel
diff --git a/config.h.in b/config.h.in
index 9a7eee7..69da3d8 100644
--- a/config.h.in
+++ b/config.h.in
@@ -55,6 +55,9 @@
 /* Define if you have the strndup function.  */
 #undef HAVE_STRNDUP
 
+/* Define if you have the vsnprintf function.  */
+#undef HAVE_VSNPRINTF
+
 /* Define if you have the <arpa/inet.h> header file.  */
 #undef HAVE_ARPA_INET_H