Fix underquoting.
--- configure.in.orig	2013-01-02 23:48:17.000000000 -0800
+++ configure.in	2013-01-02 23:48:25.000000000 -0800
@@ -4,7 +4,7 @@ AM_INIT_AUTOMAKE(aalib,1.4.0)
 AC_CANONICAL_HOST
 AC_CANONICAL_TARGET
 
-AM_CONFIG_HEADER(src/config.h)
+AC_CONFIG_HEADERS([src/config.h])
 
 dnl Initialize the compiler and linker flags for AALIB applications