add another header (not sure if it's supposed to be there, but mingw complains...

add another header (not sure if it's supposed to be there, but mingw complains about missing symbols)

pd/src/makefile.mingw

@@ -107,7 +107,7 @@ PMOBJ =  $(PMSRC:.c=.o)
 GSRC =
 
 HEADERS = g_all_guis.h m_imp.h g_canvas.h g_magicglass.h m_pd.h s_stuff.h \
-	g_undo.h x_preset.h \
+	g_undo.h x_preset.h s_utf8.h \
 	$(wildcard ../portaudio/common/*.h) s_audio_paring.h
 
 SRC = g_canvas.c g_graph.c g_text.c g_rtext.c g_array.c g_template.c g_io.c \