add a stub for compat

see https://github.com/jcupitt/libvips/issues/361

ChangeLog

@@ -1,3 +1,6 @@
+1/1/16 started 8.2.1
+- add a compat stub, thanks Benjamin
+
 7/10/15 started 8.2.0
 - added im_bufmagick2vips(), a vips7 wrapper for magick load from buffer
 - fetch unset property now returns default value rather than warning

configure.ac

@@ -2,7 +2,7 @@
 
 # also update the version number in the m4 macros below
 
-AC_INIT([vips], [8.2.0], [vipsip@jiscmail.ac.uk])
+AC_INIT([vips], [8.2.1], [vipsip@jiscmail.ac.uk])
 # required for gobject-introspection
 AC_PREREQ(2.62)
 
@@ -18,7 +18,7 @@ AC_CONFIG_MACRO_DIR([m4])
 # user-visible library versioning
 m4_define([vips_major_version], [8])
 m4_define([vips_minor_version], [2])
-m4_define([vips_micro_version], [0])
+m4_define([vips_micro_version], [1])
 m4_define([vips_version],
           [vips_major_version.vips_minor_version.vips_micro_version])
 
@@ -37,9 +37,9 @@ VIPS_VERSION_STRING=$VIPS_VERSION-`date`
 #   binary interface changes backwards compatible?: increment age
 #   binary interface changes not backwards compatible?: reset age to 0
 
-LIBRARY_CURRENT=44
+LIBRARY_CURRENT=45
 LIBRARY_REVISION=0
-LIBRARY_AGE=2
+LIBRARY_AGE=3
 
 # patched into include/vips/version.h
 AC_SUBST(VIPS_VERSION)

libvips/iofuncs/buffer.c

@@ -106,6 +106,7 @@ vips_buffer_dump( VipsBuffer *buffer, size_t *reserve, size_t *alive )
 
 	return( NULL );
 }
+#endif /*DEBUG*/
 
 #ifdef DEBUG_CREATE
 static void *
@@ -125,6 +126,7 @@ vips_buffer_cache_dump( VipsBufferCache *cache )
 void
 vips_buffer_dump_all( void )
 {
+#ifdef DEBUG
 	if( vips__buffer_all ) { 
 		size_t reserve;
 		size_t alive;
@@ -148,8 +150,8 @@ vips_buffer_dump_all( void )
 		printf( "g_thread_self() == %p\n", g_thread_self() ); 
 	}
 #endif /*DEBUG_CREATE*/
-}
 #endif /*DEBUG*/
+}
 
 static void
 vips_buffer_free( VipsBuffer *buffer )