[gtksourceviewmm] Link to the glibmm-2.52 version of glibmm_generate_extra_defs.

[Murray Cumming <murrayc src gnome org>]

commit cab0f36021959f04d1e6d53b5ccfdb72eedc52af
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Nov 15 21:22:23 2016 +0100

    Link to the glibmm-2.52 version of glibmm_generate_extra_defs.

 codegen/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/codegen/Makefile.am b/codegen/Makefile.am
index 2ddb543..ef8c491 100644
--- a/codegen/Makefile.am
+++ b/codegen/Makefile.am
@@ -6,7 +6,7 @@ dist_noinst_DATA = $(addprefix m4/,$(files_codegen_m4))
 noinst_PROGRAMS = extradefs/generate_extra_defs
 
 extradefs_generate_extra_defs_SOURCES = extradefs/generate_extra_defs_gtksourceview.cc
-extradefs_generate_extra_defs_LDADD   = $(GTKSOURCEVIEWMM_LIBS) -lglibmm_generate_extra_defs-2.4
+extradefs_generate_extra_defs_LDADD   = $(GTKSOURCEVIEWMM_LIBS) -lglibmm_generate_extra_defs-2.52
 
 AM_CPPFLAGS = -I$(top_builddir) $(GTHREAD_CFLAGS) $(GTKSOURCEVIEWMM_CFLAGS)
 AM_CXXFLAGS = $(GTKSOURCEVIEWMM_WXXFLAGS)