Export tvb_free_chain() so that tvbtest can use it.

As on Windows with MSVC, and as with reassemble_test, link tvbtest with
libwireshark and the libraries it requires.

svn path=/trunk/; revision=50575

epan/Makefile.am

@@ -155,14 +155,16 @@ libwireshark_la_DEPENDENCIES = \
 	${top_builddir}/wsutil/libwsutil.la \
 	${top_builddir}/wiretap/libwiretap.la
 
-EXTRA_PROGRAMS = reassemble_test
+EXTRA_PROGRAMS = reassemble_test tvbtest
 reassemble_test_LDADD = \
 	libwireshark.la \
 	$(GLIB_LIBS) \
 	-lz
 
-tvbtest: tvbtest.o tvbuff.o tvbuff_real.o tvbuff_subset.o except.o to_str.o strutil.o emem.o charsets.o
-	$(LINK) $^ $(GLIB_LIBS) -lz
+tvbtest_LDADD = \
+	libwireshark.la \
+	$(GLIB_LIBS) \
+	-lz
 
 exntest: exntest.o except.o
 	$(LINK) $^ $(GLIB_LIBS)

epan/tvbuff.h

@@ -135,7 +135,7 @@ WS_DLL_PUBLIC void tvb_free(tvbuff_t*);
  * must not be in a chain.
  * If specified, a callback to free the tvbuff data will be invoked
  * for each tvbuff free'd */
-void tvb_free_chain(tvbuff_t*);
+WS_DLL_PUBLIC void tvb_free_chain(tvbuff_t*);
 
 /** Set a callback function to call when a tvbuff is actually freed
  * One argument is passed to that callback --- a void* that points