[gtksourceviewmm/gtksourceviewmm-4] Build: Don't disable deprecated Pango API

[Murray Cumming <murrayc src gnome org>]

commit b3b4ac588f115c5421d453ae4a33ee2a37c3ceff
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Dec 4 15:21:06 2018 +0100

    Build: Don't disable deprecated Pango API
    
    This only affects the --enable-warnings=fatal build,
    and this is hopefully only temporary.

 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index b709126..81a3ad2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -45,10 +45,12 @@ MM_ARG_WITH_TAGFILE_DOC([pangomm-1.4.tag], [pangomm-1.4])
 MM_ARG_WITH_TAGFILE_DOC([gtkmm-3.0.tag], [gtkmm-3.0])
 
 AC_LANG([C++])
+
+# Re-enable disabling of PANGO API when gtksourceview and gtk+ stop using deprecated API (PangoDirection) in 
their API.
 MM_ARG_ENABLE_WARNINGS([GTKSOURCEVIEWMM_WXXFLAGS],
                        [-Wall -Wno-long-long],
                        [-pedantic -Wall -Wextra -Wno-long-long],
-                       [G PANGO ATK GDK GDK_PIXBUF GTK GTKSOURCEVIEW GLIBMM PANGOMM ATKMM GDKMM GTKMM])
+                       [G ATK GDK GDK_PIXBUF GTK GTKSOURCEVIEW GLIBMM PANGOMM ATKMM GDKMM GTKMM])
 
 AC_CONFIG_FILES([Makefile
                  codegen/Makefile