[pangomm] Depend on latest glibmm-2.4

[Murray Cumming <murrayc src gnome org>]

commit 840ef12409051e43c8124695549abcc0275244fc
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Mar 28 12:05:37 2016 +0200

    Depend on latest glibmm-2.4
    
    To use the latest gmmproc.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 296feca..4f32fee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,7 +47,7 @@ MM_AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])
 AC_DISABLE_STATIC
 LT_INIT([win32-dll])
 
-AC_SUBST([PANGOMM_MODULES], ['glibmm-2.4 >= 2.46.2 cairomm-1.0 >= 1.2.2 pangocairo >= 1.38.0'])
+AC_SUBST([PANGOMM_MODULES], ['glibmm-2.4 >= 2.48.0 cairomm-1.0 >= 1.2.2 pangocairo >= 1.38.0'])
 PKG_CHECK_MODULES([PANGOMM], [$PANGOMM_MODULES])
 
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])